Sekai de Ichiban Hayai Haru

Maho Haruta is a 26-year-old manga artist who has completed a major hit. She is finally supposed to start a new serial, but suddenly she sends a letter to her editor, Arashi, confessing that she cannot draw anything. In fact, the manga Maho has been drawing has a secret, and she still has "a certain regret" in her heart...! If I could do that time over again. This is a time-slip story where that thought changes everything!