Slice-of-life manga

Hatano Takaki is a third-year in high school who can’t wait to become a “real adult”. One day, he passes by a café and finds himself mysteriously drawn to the proprietress, a mysterious woman who seems to be hiding a secret sadness. Through her, through coffee, and through his encounters with the other café patrons, he begins to taste the bittersweet feelings of love and growing up.

Just imagine~ you’d just become the new demon king, drinking a little wine and singing before unceremoniously being thrown into the human realm. Not only did you lose your mana, you also became a little baby who has to live with a strange family.