an average person is reborn into the world of demon slayer, at first, it sounded good, until he found out what he was (Note: due to a friend's request, I will have to clarify this if you haven't read the story yet, this takes place in a knyverse absorbed by the nasuverse, not the other way around)

When Shikamaru Nara enrolls into the prestigious UA Academy, Shikamaru quickly finds himself on the path to becoming a Hero whether he likes it or not. My Hero Academia belongs to Kōhei Horikoshi Naruto belongs to Masashi Kishimoto