One day, diehard manboob-lover Komai is hit by the sight of his senior colleague Kushiro's button-bursting cleavage, and instantly falls in love! Troubled over his lust for the soft-spoken Kushiro, Komai attempts to avoid his colleague. However, his efforts are in vain, and his lower half grows ever-closer to going berserk. On the other hand, Kushiro notices that Komai is struggling with a problem, and offers to help with "anything" that's within his ability. The offer is met by Komai's desperate plea, "Please let me fondle your voluptuous chest!" What Komai didn't expect is that Kushiro surprisingly... agrees?!