After school on physical-measurement day, Hinano is sitting alone, depressed about her slow physical development. A strange man approaches and says he is a trainer who can advise her. Hoping to look a little more mature, she follows him and accepts a drink secretly spiked with an aphrodisiac. Her body soon feels wrong: even the lightest touch overwhelms her, leaving her convulsing and cumming again and again. Produced and copyrighted by K.M. Produce.