The sea is vast and boundless without knowing its limits; the rainbow appears and disappears but is ethereal; its posture is inherited from generation to generation.
Uni's gender is changed, giving Uni a happy life. The first part is similar to a quick time travel, one world after another, and the second part is comprehensive. It is uncertain how many worlds there are. I'll see what everyone recommends, but I will write it after I have read it.
Already scheduled to include: Angel's Dream, Tutor, Kuroko's Basketball, Touken Ranbu, etc...
We don't all follow the plot. When writing fan fiction, it's better to read the original work than to follow the plot. The original purpose is to see some characters who are distressed and want to give him (her) another life to make them happy. If you want to read the plot, read the original work. Thank you!