On the verge of graduation, Yuu had planned to leave home in order to forget his feelings for his stepmother, Yuki. However, on his way home from the graduation ceremony, she unexpectedly waved at him and ran over, reigniting the emotions he had tried to suppress. That night, as they celebrate his graduation alone together, a drunken Yuki gently kisses Yuu. Though Yuu struggles to resist his uncontrollable desire, the deep feelings buried within his heart begin to awaken once more. This fateful encounter, marking a new beginning, will change their relationship forever.