"Maybe I'm frigid..." Miyashita Kotono, an office lady working in Tokyo, was dumped by her boyfriend because of their incompatibility, and she began to worry that she might be frigid. Then , while drunk, she confides her worries to her younger childhood friend, Saeki Kanade, who has moved to Tokyo to attend university . Then Kanade suggests an "erotic massage"...?! Kotono is hesitant, but gradually becomes addicted to the pleasure Kanade gives her. They make love again and again under the guise of lessons, and as he treats her gently, Kotono begins to realize she is attracted to Kanade... "It seems Kanade has someone he's decided on... I have to end this relationship..." Kotono worries, but something happens and Kanade misunderstands her and reveals his jealousy...?! As Kanade continues to attack her , saying, "I'd never give him to another man," Kanade reveals his true feelings, and Kotono learns this......and it ends happily!