To forget his feelings for his father's new wife, Minami, Yuta entered a boarding school. As his school life comes to an end, Minami appears at the graduation ceremony with a bright smile, reawakening his suppressed emotions. That night, while spending time alone to celebrate, she whispers, "This is your graduation gift..." and initiates a deep, wet kiss. The boy begins his journey into adulthood, one step at a time.