Himari has married a divorced man and started a new life with her husband's stepson, Takeshi. A month into their new life, her stepmother, Himari, is surprised by a loud scream coming from Takeshi's room on the second floor. When she peeks into the room, she sees him giving a titty fuck with a love doll. Even after he ejaculates, Takeshi still doesn't stop giving the love doll a titty fuck, and her stepmother, Himari, worries about her son's future and takes on the role of a mother, taking off her bra and panties... Worried about her shut-in, insatiable son, her busty stepmother goes too far with the titty fuck rescue.