Why Does Muichiro Forget Everything In Demon Slayer?

During a thunderstorm on the border, my fiancee, Eleanor Ashby, covers my retreat and falls down a cliff. The search and rescue team spends three months searching through flash floods without finding a trace of her. Everyone concludes she's dead. I refuse to give up and spend another two years looking for her. Eventually, I find her at a small clinic in a remote mountain village. But she's become the wife of the clinic's caregiver, Dylan Foster. That's when I learn she's lost her memory and fallen in love with someone else. In my previous life, I ignore her wishes and force a renowned neurosurgeon to use a high-risk treatment to restore her memories. The day her memories return, the man who has cared for and protected her for the past two years throws himself into the river in despair. Later, during an earthquake rescue mission, Eleanor and I are trapped beneath a collapsed mountainside. There's only one narrow escape route wide enough for one person. She forcibly pushes me out. Moments later, a second collapse buries her beneath a massive boulder. With her dying breath, she reaches through a crack in the rocks and grips my hand. She says in a hoarse voice, "Callum Pierce, these ten years we've spent together is repayment for the debt I owed you from the ten years before. We're even now. Neither of us owes the other anything anymore. "If there's a next life, don't let me remember the past. Please... let me be with him." Tears blur my vision. When I open my eyes again, I'm back on the day I find Eleanor. This time, I choose to respect her decision and let go of the life she's forgotten.

Three years ago, I've pushed my boyfriend, Niccolo Moretti, into the sea even though he doesn't know how to swim. Then, I leave the scene with my new beau. Niccolo is lucky enough to survive the ordeal. After he gets saved by the Greco family, he's quick to get betrothed to the principessa of the family, Bianca Greco. Everyone claims that I'm a heartless woman who's capable of killing her ex-boyfriend just to be with her new lover. But what they don't know is that I've gotten diagnosed with anterograde amnesia. It feels as though there's an eraser that has erased everything about Niccolo in my mind. Three years later, Niccolo and Bianca bump into me at a restaurant. He gazes at me haughtily, though immense hatred can be seen burning in his eyes. "Elena Mancuso, when you pushed me into the sea and left with another man, did you ever think that your family would get annihilated one day, leaving you without any protection? "To think that the principessa of the Mancuso family is now working at a restaurant as a pathetic waitress!" I don't remember having met the man in front of me at all. "Did you mistake me for someone else, sir?" Niccolo continues to mock me. "Oh, so now you're acting, huh? Fine, we'll go along with your performance. Bring me the menu." Upon hearing that the customers want to dine in this restaurant, I glance at the memo app on my phone before passing a menu to them as per the instructions.

Mona wakes up, trying to stab Kai and not remembering anything past the age of six. Instead of killing her, Kai rejects Mona as his mate and banishes her. But not before blaming her for the death of the people closets to her. Years later, Mona isn't the girl that couldn't remember. She is now Alpha Moon, the Alpha of the Wolvin pack, a group of former rogue women and a few men. She still can't remember everything from her past and every memory she gains leaves her with more questions. How could she do all these horrible things in a former life? And how can she protect her pack from new threats and old ones?

When I find out there's a tumor growing in my brain, the Kane sisters are in the middle of celebrating Evan Kennedy's birthday with him. If I undergo the tumor-extracting surgery, I'll risk losing my memories. I don't want to forget the sisters at all, so I call them in hopes of seeking their help. But all three sisters don't hesitate to berate me on the spot. "Why can't you be more understanding, Declan? It's Evan's birthday today! Nothing is more important than his birthday!" Heartbroken, I feel immense pain wrecking my head. That's how I end up collapsing three times in a row later on. When I regain my consciousness in the hospital, I see a text message sent by Evan. "Declan, the Kane sisters have given me three protective charms just to protect me." In the photo, the "protective charms" are actually the very same charms I have managed to obtain after spending ten hours climbing a mountain while groveling all the way. My heart has officially died at that moment. So, I decide to fly overseas on my own to undergo that life-saving surgery and forget all about the Kanes. Weirdly enough, the sisters go crazy right after I've forgotten about them.

My wife, Giselle Stone, has severe face blindness. She can't remember anyone's looks, including mine. It's already a norm for her to chat with me animatedly one moment, then her illness kicks in, resulting in her mistaking me as a stranger the next. Giselle screams at the top of her lungs as she fights with me over the steering wheel, causing me to crash the car at the side of the road. As I lie in my puddle of blood, I beg her in a quivering tone to call 911. But Giselle steps over my blood as she bolts over to the police. "Officer, this man is a human trafficker! I don't know him! Please arrest him!" Thank goodness I've already developed the habit of bringing my marriage license and Giselle's medical records with me all the time over the years. After clearing the misunderstanding with the police, I deal with the damages and get my injuries treated before going home. That's when Giselle blocks me at the front door while glaring at me vigilantly. "Why are you here again? I don't know you! Please leave right now!" When I'm about to explain, Giselle's childhood friend, Jasper Langley, steps out and wraps an arm around her shoulders. "He's your husband, Giselle. Calm down now." As I watch the pair hugging each other, I suddenly let out a soft chuckle. We've been married for three years, and yet this is the 677th time Giselle doesn't recognize me. The thing is, she can recognize Jasper every time and always listens to him. In that case, I might as well let Jasper take care of her from now on.

After I suffer from a miscarriage, Jude Dixon, my psychiatrist husband, hypnotizes me and seals my memories so that he can take his depressed patient, Maddie Pittman, on a vacation. For the next three months, Jude and our son, Oliver Dixon, keep Maddie company as they travel around together. Once they are finally done with the vacation, Jude decides to unseal my memories. Once again, I become a mother and a wife. But now, I no longer deal with the household affairs, nor do I nag their ears off. At first, Jude and Oliver think that I'm just trying to attract their attention out of spite by playing hard to get. They don't really care about my change in behavior at all. That is, until they see my post on a forum. "Help! What should I do when my memories are back, but my feelings aren't? Heck, I can't even relate to the past me! Right now, I feel super nervous and awkward whenever I'm in the same room as my husband and son! What should I do? Please help me!"