During a summer trip, childhood friends Satsuki, Koyuki, and Yuuna rediscover their deep bond, their playful teasing escalating into passionate intimacy. Beneath the moonlit waves, their shared desires ignite, leading to tender yet explicit encounters where each explores the others’ bodies with fervent curiosity. Their friendship blossoms into a sensual triad, filled with whispered confessions and ecstatic release under the starlit sky.