This dude Yoshiyuki loves to work out. He also loves sex, cause he's not dead. Now that he's a teacher at an all-girls school, he gets to combine his two favorite things. He decides to give his struggling students some private tuition, AKA, his dick - cause that certainly won't be hard to grasp.
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.
A young male teacher has his female students falling for him. At least they do kinda give him the signs. It's only right he takes it one step further, starting with some much deserved anal action. Episode 2 sees our protagonist changing careers and being a full-time rapist.