Shinji Ouhashi works for Sayaka Asai, a lonely widow who owns a laundry service with home delivery. But Sayaka's not the only lonely lady in town! Shin-chan runs deliveries and provides more than laundry services for their busty, MILF-y customers.
On spring break, Daisuke heads to a tropical island. Turns out, his female cousin and a couple of his girl friends are also there. What do you get when you put them all together with a bunch of teenage hormones? A harem. It's always a harem.