Hikari, a freshman at university, is invited by her only close senior, Sakura-senpai, to a seminar on growing a futanari penis called "Maraway" and detoxifying bad "chi" along with sexual fluids. Out of curiosity, she went to a place where she found a group of people swinging their futanari dicks while swinging their legs in a "Shikoshiko Health Exercise". Due to the effects of the incense that Maraway uses, Hikari grows a futanari penis! Her senior presses her breasts against her and strokes her...