A Realist Decides to Become a Decent Villain [Anime Crossover: Jujutsu Kaisen]

A beautiful, sunny day. Mahito, a Special Grade curse with gray-blue hair, born from humanity's fear of humanity, mysteriously vanished for three days. When he finally returned to the cursed spirits' base, he looked utterly dejected. The first thing he said was: [Sorry, everyone. It turns out I really do want to be a good person.] The villains: "...?" Snap out of it! Whether you're good or not is beside the point. You're not even human!! Mahito is still Mahito. It's just that one day, it was as if his brain had been turned inside out. His behavior, personality, and interests became completely different from before. For example, he had planned to use a pitiful victim of bullying. But halfway through, an indescribable feeling of sympathy and affection suddenly welled up in him. Well, now he couldn't bring himself to do it. For another example, he had planned to take out his natural enemy in one fell swoop. But when he got a good look at the other person's face, he turned on the salarymen and scolded them: What is wrong with you sorcerers? How could you send an underage kid to the battlefield? Nanami/Itadori: ...Huh? For yet another example, he ran into Gojo Satoru and tried to talk his way out of trouble, only to be shocked: So your dream is to create a world where humans and cursed spirits can live together in peace, too! 5T5: I don't actually have that kind of dream. And then there's how he completely lost interest in experiments, developed empathy, fought fair and never attacked by surprise, and became best buddies with his opponents... The villains: Wait, is this really Mahito? Mahito: ...You tell me? Warnings: 1. The Mahito in this story is a fake, an atypically good person who stands in opposition to the original Mahito. As for why he turned out this way, you can just imagine his brain got struck by lightning (smiles). 2. JJK doesn't have any decent, wholesome villains, so I'll write one myself. 3. I can't think of who to pair him with, so I'll go with the flow. 4. My own brand of happy, out-of-character comedy. Theme: Everyone better stay alive and well.