Tsubomi is a dedicated member of the table tennis club, and her hard work pays off when she receives the exciting news of being selected as a regular player for the regional tournament qualifiers. Eager to share the news, she goes to see her admired senior, Natsu, who initially treats her with some coldness. However, Natsu gradually warms up to Tsubomi, moved by her passion and forwardness. Though Tsubomi appears gentle and innocent, she surprisingly has a bold, erotic side. Natsu, who maintains a calm exterior, finds herself increasingly drawn to Tsubomi. The two deepen their lesbian relationship in various locations, including the club room, bath, and classroom. A poignant yet passionate story unfolds, intertwining pure youth with hidden desire.