A young couple, Kaito and Maiko, still early in their relationship. Spending the night at Maiko's place for the first time, they share their first intimate moments together. When they end up taking a bath together, Kaito becomes increasingly aroused by Maiko's shy and embarrassed reactions. Soon, things naturally escalate in the bathroom, and the two become far more passionate than they ever expected. How will their pure feelings for each other manifest on this unforgettable night?