Shy teen Fukaya became the lover of a very quiet and beautiful girl, Fujino but she likes her personal vibrator and carrying it always.In fact, their relationship began when he found her using a vibrator aboard a crowded train and accidentally they had sex while commuting. Although they have passionate sex, he can't be certain that she loves him, and feels threatened by her vibrator. Now, the two of them are going to a pool. As she will be unable to use the vibrator in the water, he expects they will be alone, but they continue having sex in the bathroom. Will Fujino loves her vibrator more than the real thing of his boyfriend? find out!