Chitsato has a goal; to be as capable as Isogai-senpai who is the "Devil" of Project Management but her goal is far from being successful because Isogai is always harsh on her.

One day while on her way home, she bumped into a drunk Isogai. Mistaken Chisato as his ex girlfriend, Isogai forced a kiss on her....

This manga contains 5 different stories illustrating the fear and confusion of the main protagonists on their journey in pursuit of love.