■ Satsuki Ena: A straight girl who is heartbroken after breaking up with her boyfriend. A pure girl who is taken on a hot spring trip by Hibiki. ■ Hibiki Otsuki: Ena's best friend who she has known since high school. She brings Ena on a hot spring trip out of concern for her broken heart. She is actually a lesbian. ■Synopsis Ena is heartbroken after her broken heart. Worried about her, her best friend Hibiki invites Ena on a hot spring trip and they go on a trip together. Hibiki, who is actually a genuine lesbian, sees Ena's naked body when the two of them enter the hot spring and becomes aroused by her attractive appearance. Hibiki tells her rationally that she can't do it, because Ena is her best friend. However, as she drinks, she can no longer control her feelings and her body starts to heat up with her emotions. She suddenly confesses, "I've actually always liked Ena," and presses for the start of a passionate relationship. At first Ena is surprised and confused, but before she knows it she is hooked on the incredible charm that can only be experienced between lesbians and begins to seek out Hibiki of her own accord.