Long before the events of Don't Call Me Dirty, Hanao Kaji and Ryuuji Mita were close friends... When Ryuuji is left to raise his son Shouji as a single father, Hanao steps up to help him out. At first, their family life is happy...

After some time attempting a long-distance relationship, Shouji is crestfallen when he finds out his crush isn't gay. Having struggled with his sexuality for years, he tries to distract himself from the rejection, in part by helping out at the neighbouring sweets shop - but...