The main character is Sakamoto, an ordinary college student. He became friends with Mari Himeya, a beautiful girl he met at his part-time job, through a competitive game, and they started playing against each other in his room on holidays, but since he was a valuable real-life opponent, he tried not to be conscious of his gender. was. But one day, Mari came wearing miniskirts. Sakamoto, who is a big fan of miniskirts, can't help but notice Mari's lower body. Moreover, as the game gets more heated, Mari becomes less guarded and starts flashing panty shots. Will Sakamoto be able to hold back his sexual desire towards his girlfriend's friend? Of course it can't be done! Sakamoto, who has lost his sexual desire, and Mari, who is under pressure from her male friend, is confused but can't help but feel the pressure. Please enjoy the passionate friendship sex between two people to your heart's content.