When Masato wakes up with a terrible hangover, he finds himself half-naked in a room he doesn't know for some reason... And the person sleeping next to him, who is also half-naked, turns out to be Haruka Kashima, a junior at the company who has been on his mind for a long time...!Masato had wanted to confess to her seriously someday, but she accidentally spent the night with Masato and apologized.Seeing Masato's attitude, Haruka became displeased for some reason...? !