Sexy Cats: Kaitou Cosple Sanshimai

A wealthy married woman finds passion with a lover while her husband lusts after his wife’s younger sister. The lover convinces the wife to invest her inheritance in land development and also attempts to steal her money. When the frustrated husband discovers what’s going on he decides that his wife is in need of a little discipline.

Tenmasou is a long-established inn atop a mountain overlooking the sea, in a town called Mitsuse that exists between heaven and earth. The inn is run by Nozomi Tenma, the proprietress. Her younger sister Kanae works as a dolphin trainer. Their mother Keiko is the inn's elder proprietress, who is still resentful of her ex-husband that deserted his wife and family.

The awkward, distant, and wounded three sisters gather at their hometown for their father's birthday. However, on the day of the party, there is a big mess because of their little brother Jin-seob's abnormal behavior, and the past of the three sisters slowly reveals.

As a family-run confectionery shop in Kagoshima struggles to stay in business with increasing competition from local supermarkets, the family's three daughters experience various troubles in their private lives.