Isekai Manga With Leveling System Novels & Stories

My roommate, Sylvia Colman, is the ultimate overachiever at Southend High School. She sleeps only three hours a day and takes first place in every exam throughout all three years of high school. As for me, I'm known as the "sleepy slacker" in our school. I sleep in class, constantly fail exams, and can even fall asleep while walking. My parents are completely disappointed in me. They say I'm a hopeless mess. My childhood friend, Jeffrey Rivers, also turns his back on me. He claims I've fallen too far and becomes Sylvia's die-hard fan instead. But when the dean of studies summons me for a talk to tell me that I face the possibility of being expelled, I accidentally discover the secret behind Sylvia's inexhaustible energy. It turns out she has been transferring all of her exhaustion and drowsiness onto me. She's the one stealing my energy, my grades, and my life! On the night before the SAT, Sylvia confidently stays up all night doing practice papers for one final push before the real deal. I smile slightly as a plan forms in my mind. Inwardly, I sneer, "You despicable thief who stole my life… I have a wonderful surprise in store for you. Stay tuned and accept my gift to you!"

I'm supposed to become the valedictorian of the state, but I decide to not attend the SATs. After all, in my previous life, my best friend, Bianca Walters, had made a pact with a tenfold transfer system. The three-million-dollar prize money I had obtained from becoming the state valedictorian was transferred into Bianca's account. On top of that, it was increased by ten times as well. Just like that, Bianca moved on from wearing faded old clothes to limited branded apparel. She even muttered, "What's the point of being a top scorer even though you're poor? At the end of the day, you'll still slave away for us rich people!" Enraged, I rushed over and demanded Bianca for answers. But my boyfriend, James Tipps, was quick to shield her from me and yelled at me for being a crazy lady who was jealous of others. Since my mom couldn't get her illness treated due to the lack of money, she ended up dying with resentment in her eyes. Overwhelmed by despair, I took my life by jumping off a building. Beep! When I open my eyes again, I realize that I've gotten reborn. This time, I've also made a pact with the tenfold transfer system.

After six years of working as a corpse porter, I finally saved enough money to treat my sister, Maeve Xander, for her liver cancer. Maeve, however, casually refused the surgery. “I’m not actually sick. Mom and Dad aren’t dead either. I staged that car accident. You’re the only one who ended up seriously hurt and disabled.” Then my wife, Laurel Jinks, also confessed, “I’m not bankrupt. Every time I said I had to work late, it was because I didn’t want to cram into that filthy basement with you. I was going back to my mansion. I originally planned to punish you for three more years, but you reek of dead bodies. Maeve and I just can’t take the smell anymore.” A wave of pure absurdity washed over me as my body froze with the hand holding my credit card still in the air. Maeve snatched the card from my hand and tossed it into the trash. “That card is empty. I gave all the money you made carrying corpses to homeless people. Think of it as doing good deeds for the child you lost. After all, taking money from the dead is cursed. It’s bad luck all the way down. We shouldn’t touch that filthy money.” A chill ran down my spine. I did not understand why they treated me this way. Then, I saw my parents. They were standing far away from me, as if I were a plague. I completely broke down. “You bullied Cameron because you are the only son of the Xander family, so we wanted to teach you a lesson. If you promise to never bully Cameron again, we’ll still consider you our son. If you do not promise, we’ll cut you off, and you’ll be dead to us.” Just as my heart sank and I fell into despair, a sympathetic voice from the system sounded in my mind. [Jude, do you wish to abandon this mission and leave this world?]

After my wife, Princess Keisha Peyton, spent a reckless night with her adopted brother, I chose to abandon her and our child and return to my original world. But the next year, the system suddenly came to find me. [Host... could you go back for a while? The target has been trying to break through dimensions to find you. And your child... he's also a bit mentally unstable...] I looked down at the cancer diagnosis I had just received and sighed. "Fine. I'll go back." When I returned, I became the perfect prince consort. I no longer demanded monogamy. Instead, I even started actively selecting male companions to bring into Keisha's household. I also dismissed the tutors who had been pushing my son to study, allowing him to join the military camps while he was still young. I rarely went out and kept the princess's estate running flawlessly. But when Keisha saw all this, she went crazy—smashing every ornament in the room. "I already sent Gregory away," she said. "What are you trying to do, tormenting me like this?" Our son, Thomas Peyton, stood there tearfully. "I'll never say again that Mother can have many male companions because she's a princess. And I'll never mention Gregory again either. Father, please stop making a scene, okay?"

To stay by the side of award-winning actress Victoria Quinn, I gave up the system's one-billion-dollar cash reward. I also drained every last one of my luck points to make her paralyzed legs heal. The price was that my life became bound to her loyalty. If she ever betrayed me, emotionally or physically, my soul would be ripped from my body and erased completely. At the moment of binding, I hesitated. But when I looked into her eyes and saw the depth of her love, I believed her. I believed her when she said, "Out of all the people in the world, I only want you." So I chose to become the man who stood silently behind her, giving everything without complaint, and I pressed confirm. For seven years, we loved each other as deeply as we had in the beginning. Hand in hand, we weathered every storm together. Until our wedding anniversary. I was in the kitchen making her favorite soup when I suddenly coughed violently and spat out a large pool of black blood. Then I looked down and saw my fingers slowly turning transparent, so faint that I could no longer even touch the glass in front of me. At the same time, a piercing alarm rang through my mind. "Warning. Bound target's love value has fallen below the critical threshold. Erasure protocol activated..."

After completing the quest, I insisted on staying in that world, foregoing the lucrative rewards. It was because I had a happy and perfect family there. My brother was a genius world-renowned scientist, and all his research achievements were named after me. My father was the world's richest man, and all his wealth was under my name. My mother was an extraordinarily talented dancer, but she gave up the stage just to spend more time with me. My family pampered me. I was the most envied pampered daughter in the world… until the day their real daughter, Carrie Langford, showed up at our door. Their love for me vanished overnight. From then on, I became inconsequential. Carrie orchestrated her own fall down the stairs, and my mother was so angry that she broke my leg. I ate a small bite of the cake Carrie threw away, so my father locked me in a dog cage for three days to dine with the dogs. He also made a golden cake for Carrie to make her feel better. Just because Carrie complained that her heart hurt, my brother dug out my heart for her and replaced it with an artificial heart. "It's just a heart. You've always been healthy. Carrie needs it more than you do." Calmly, my brother stood to the side, analyzing the data. "Don't worry, artificial heart technology is already very advanced, so the theoretical survival rate is very high. You won't die." After my soul left my body, I saw Carrie casually throw my heart into a trash can. The long-dormant system was awakened. [Would you like to take back everything you've given them, including your father's wealth, your mother's dancing talent, and your brother's intelligence, in exchange for a chance to revive?]

Bima is just an introverted, scrawny kid used to living behind a gaming screen and being a constant target for body shaming. But his life takes a drastic turn when he wakes up in a ruined city crawling with zombies. In the midst of the chaos, something even stranger than the apocalypse emerges: the "Single Survival System," which hits him with absurd missions likes maintaining an ideal BMI, getting revenge on his bullies, and landing his first kiss. Every mission isn't just a ridiculous challenge; it’s a matter of life and death. Forced out of his comfort zone, Bima must face his dark past. He crosses paths with Donny, his former bully who is now a zombie, and Kevin, an ex-gym influencer who has transformed into a fanatical cult leader obsessed with the perfect physique and extreme protein intake. Amidst the chaos, Bima meets Lia, a tough convenience store clerk who harbors a deep-seated trauma toward food. Together, they survive nonsensical threats, ranging from zombie food vloggers obsessed with livestreaming death to grotesque mutants lurking underground. But the madness is only the beginning. Bima’s reckless actions catch the attention of a far more dangerous entity: the Master AI Fitness Freak, an artificial intelligence that views humans as inefficient unless they meet extreme nutritional standards. With the help of Riska, an AI with cold, business-like logic that shares a secret connection to Bima’s past, the battle shifts into a clash of ideologies: perfection versus happiness. In a world that worships muscles, protein, and ruthless efficiency, Bima fights back in an unexpected way, using Indomie as a symbol of balance, hope, and humanity.

I had regressed ninety-nine times, and it all started because I brought home an injured man. Every time I came back, strange floating comments appeared in front of my eyes. I could also hear my baby brother's thoughts. The moment my brother saw Tristan Price, he screamed and refused to stop crying. "Send that man back! He's going to get our whole family killed!" I reached out hesitatingly toward Tristan, and the chat overlay flickered to life again. [The man lying in your bed is your future husband and the prince regent. He never forgets a kindness. Save him, and he will make you his princess consort. Your entire family will be protected and well provided for.] The first time, I followed my heart and did what the messages told me to do. I saved Tristan, and he used me as a human shield. The assassins hunting him found us, and my entire family was slaughtered. The second time, I listened to my brother instead and sent Tristan back where I found him. His men came to our door anyway, accused me of leaving him to die, and killed everyone. The third time, I found Tristan's closest aide before the assassins arrived and quietly handed Tristan over. Then Tristan went mad without warning and stabbed me himself. When my family tried to avenge me, they were killed too. I tried every approach I could think of to avoid my family's tragic fate, and every single one ended in failure. This time, I chose to wait for death. Then the comments appeared again, and something about them caught my eye.

My wife's family ran on the old logic: sons mattered, daughters were a tax. They called my five-year-old daughter "the cash drain" to her face. On New Year's Day, my wife told me my daughter was donating a kidney to her cousin. I was about to lose it on every adult in that room when something appeared in the air in front of me, a column of text only I could see: [Is this woman seriously the mother? She says it's a kidney transplant, but she actually wants the kid's heart.] [If I had a mom like that I'd have cut her off years ago.]

On the day Steven, my husband, died in battle, Luke, my only son, was kidnapped by human traffickers. Wendy, my mother-in-law, cursed at me. My parents blamed me for it. Even the villagers said I deserved it. While I was consumed by grief, Wendy suggested I take in an abandoned baby to continue the family line. Just as I was about to agree to it, words suddenly appeared in front of me. [The villainess wouldn’t ever expect the male protagonist to actually be alive, right? Does she know that he’s with the female protagonist?] [That’s right. Even the news about her son being kidnapped was fake!] I was confused. Before I could make sense of it, I saw more words. [Honestly, the villainess is pretty pitiful. Her husband faked his death because he likes her sister! Even her son isn’t her own flesh and blood.] [That’s not all. The abandoned baby is actually the protagonists’ son! When she brings up the boy and sends him to university, the protagonists will reunite with their son and be a happy family.] [It can’t be helped. It’s her fault for being the villainess. She can only be a stepping stone for the protagonists.] I was stunned. I was only to be a tool for the happiness of Steven and Margaret, my sister? As I carried the abandoned baby I had picked off the road, I sneered. If they wanted me to be their stepping stone, then they could not blame me for playing a little substitution trick.