the story takes place in a private yamashita high school. nagase iori (voiced by ai toyosaki), who has a warm smile like the spring breeze, a black-bellied and vicious tongue on the outside but actually very delicate and fragile inside. heiko inaba (voiced by mizuki mizuki), who can only be called yae katsutachi (voiced by mizushima osamu), who has high martial arts skills but suffers from male phobia, and yuki aoki (voiced by takutao terajima), who has a frivolous style but is actually very dedicated. these five members of the cultural research department live a peaceful day as usual, but what they don’t know is that soon, their fate will be reversed because of something. ccc。 personality transformation happened without warning. this plot that only happens in science fiction novels made the officials feel overwhelmed. however, after shock, excitement comes with it, and there are few opportunities to use other people's bodies to experience the world. but with the change of personality, the secret feelings and sad past hidden deep in the hearts of the officials can no longer be hidden. can they face these sad or cruel truths optimistically?