>>281800732
I actually had a stupid fanfiction tier idea for one a while back, it would have the 3 hallmarks of anime original movies, one-off OCs probably voiced by a famous seiyuu, non-canon plot that doesn't affect the story, new worldbuilding material that never gets incorporated in the main series.
Basically
>a girl zings with Rentarou but Rentarou doesn't zing back
>God appears and tells him of another form of soulmate love called unrequited love, and it would be purely one-sided and she's not part of the destined 100
>the girl ends up being a yandere and plans to chase and hunt the other girls down so Rentarou would be her's only
>the movie than turns into a bunch of wacky shenanigans of the other kanojos running away and hiding and bumping into each other almost scooby doo style while Rentarou tries to stop her
>yada yada yada the movie ends with the yandere girl either dying, getting over her unrequited love and finding an actual soulmate, or it was all a dream
I didn't think it through that much beyond the initial idea honestly, I just thought if a murderous yandere jealous of the other kanojos were to exist she would be perfect for an anime original movie that could be a comedy with a horror twist.