After Shirakawa Hotaru bravely confesses her feelings for Inami Ken, the two embark on a blissful journey as a couple. However, their harmonious relationship encounters a twist when Ken befriends Hotaru's closest confidante, Tobise Tomoe, during a fateful summer. As Tomoe exudes a unique allure of her own, Ken finds himself at a crossroads, torn between loyalty to Hotaru and the magnetic pull of Tomoe. Should he fail to make a decision, he risks losing both the women who hold his heart.