48 Miracles of the Sex King(Seikiō 48 no Kiseki)

Kei Yoshida is an unpopular cherry-boy. He gets yelled at by the store manager at his part-time job. Kei's only comfort is Ayana, a gentle and cute senior colleague at his part-time job. He has quite a crush on her. However, one day, Kei sees Ayana and the store manager going at it like rabbits in the changing rooms at his workplace. Shocked and stunned by the lewd spectacle, Kei wanders the streets in a daze. A fortune-teller calls out to him and tells him "Those who achieve the challenge of The 48 Miracles can become the king of the world. The challenge is to conquer 48 sexual skills with 48 women”. Kei decides to face the challenge to change his destiny ...