Yuki's carefree romantic parents abruptly embark on a passionate voyage, leaving him to reside with an old acquaintance of his father's. Uninformed about his new home, Yuki only knows that his dad's friend is a writer with a trio of offspring. Upon meeting the jittery, fussy messenger, Aya, he senses something amiss but only comprehends the reality after being welcomed into the abode. With no prior interaction with females, Yuki is confronted with the prospect of cohabitation with four of them. The matriarch of the family is an author of adult literature, who regularly subjects her daughters to awkward sexual encounters. How will Yuki handle the challenges of his new existence?
