Senior Takeda Harumi has a rough personality, but is very good at taking care of others. On the first day of work of his junior Igarashi Futaba, Takeda mistakenly thought that the short girl was a middle school student, which made Igarashi's first impression of Takeda quite bad. But his boss assigned Takeda to guide Igarashi. This work tells the various love comedies that happened between Takeda and Igarashi after that.