Which Anime Studio Adapted The Promise Trilogy?

When Mizuko slipped into the other world, she landed in the arms of a mischievous demon prince, Kenshi. New to the world, she didn't know he was a demon as he looked to her like he was a decent person. Because Kenshi helped her first, Mizuko decided to ask him for help in finding a way home while she fulfills the dead mage's request in relaying the message to the King. But no demon in Souzou helps unless they get something in exchange. A promise, it is what Kenshi wants the most.

A world where magic exists and they call them promises. A girl named Eileen will enter this strange school that will lead her to something she didn’t expect to know. Entering this world will make her life turn upside down. Figuring things out with her own and having people that have magics with them that will help to know why she’s there in the first place. Looking for answers and solving the mystery of this world. She enters the school and meets a girl named Tracey where she finds out about magic but strangely she encounters an incident. An incident that will make everything difficult for her because things are getting started. Encounters someone,an evil person, that wants power and starts to make troubles that are dangerous for them. As the protagonists join forces to stop her but conflicts occur as they go deeper about the secrets of the school.

In Reychelle City, a contest was held to crown the most beautiful woman. After my cousin scarred my face, she seized first place with ease. What she never expected was that this year's contest wasn't for fame; it was to select the future wife of the Third Prince, a ruthless, bloodthirsty eunuch. That very afternoon, gifts poured in by the cartload. My betrothed panicked. That night, he tore up our engagement contract and carried my cousin into the bridal chamber. The next day, she trailed her lacquered fingertips across my cheek and sneered, "Alicia, with your ruined face, who would ever want you? Perhaps the beggar at the street corner might take you in." I caught her wrist, let out a cold laugh, and said, "Who told you I would marry a beggar?" Before her stunned eyes, I pushed open my parents' chamber doors. "Mom, since Maggie doesn't wish to be the prince's consort… let me take her place." Three years later, before the eyes of a shocked court, the Third Prince entered the grand hall with me at his side, with two children in tow. No one had foreseen it. This body of mine, blessed with the rarest gift of fertility, was the perfect match for a man believed incapable of siring heirs.

           Méah, teenage a girl who lived a rough life in fear and seclusion, was blamed and being hunted down for all the bad luck that happened to their village. While fleeing from the angry fellow villlagers who want her dead, she just found herself far away from home. Unfortunately, things in the outside world was worse than she expected. Only then she found out that she was being controlled by Purple Smoke, a powerful, cunning demon of an unknown origin behind the murders that she committed, all for the sake to achieve immortality. Despite knowing that she is the heir of destruction, this didn't stop her from believing that there was still 'good' in her. And so she decided switch to the good side and follow a righteous path. She indeed became one but it came with a price not only to bet her own life on the line but also go against the person that she holds dearly in her heart, who also had an identity of his own and a duty to fulfill–to protect the world from her. However, a shocking truth was suddenly revealed and her fate was much more twisted than she had known it, unveiling more hidden mysteries about her existence...

In a world where mortals and gods exist side by side, a hidden prophecy threatens to tear them apart. Iana, born from a forbidden love, is forced to hide away in a forbidden forest to protect her from the wrath of the gods and the prejudice of the kingdom. But when Prince Edon discovers her during an annual festival, their fates become intertwined, and their love is put to the ultimate test. As they navigate the challenges of being outsiders in the kingdom and face relentless attempts on Iana's life, they must embark on a perilous journey to uncover the truth and bring about a resolution that unites mortals and immortals. With love, resilience, and determination, Iana and Prince Edon prove that they are the key to reshaping the destiny of their world.

After defeating Yami, Hikari chooses to live with him. Before this, Hikari only has himself to face everything. But this time, fate has brought him to meet with a group called Hitaku. All of them have their own story. no matter what kind of things they need to do. Sometimes, they smile, cry, and... well, no matter what kind of situation they're in. they always have their way to face it. but the question is, Can they succeed in achieving their dreams in their way?