One day, Shota is threatened by a man he doesn't know and is saved by a female college student named Kei who happens to be passing by. Shota is delighted to see Kei's huge breasts. He is taken to Kei's house to have his injuries treated, but as if to repay her kindness with evil, he plays naughty pranks on her! He rubs her boobs while she cooks in the kitchen, takes a bath with her and she gives him a blowjob... Finally, he goes to Kei's house at night...