Soon after his father remarried, Yu left home to attend school. He enjoyed a fulfilling campus life and finally reached his graduation ceremony. On the way back, the person who ran towards him with a smile was his stepmother, Ikumi. He had kept his secret admiration for her hidden, thinking that this journey was just for himself, but their unexpected reunion reignited those feelings. That night, the two celebrated his graduation together, and Yu saw Ikumi to her hotel room. Even there, their conversation never ended, and the atmosphere remained lively. Then, Ikumi said, 'This is a present for grown-up Yu,' and pressed her lips against his―
