Even though Ibuki is a beauty, she is said to be a "difficult person" as she is unable to express her feelings well. She flirts with guys for a month but always ends up saying, "It wouldn't be fun to be with me." At this time, she witnessed the transfer student, Hoshino-kun, charging his own body! He calls himself an "AI" and in exchange for her silence, he said that he would provide Ibuki with the "sweet love" she desires...!? A strange, forbidden love story between an AI and a human begins.