Yu, who entered a boarding school at the same time as his father's remarriage. His student life ended in the blink of an eye, and on the day of his graduation ceremony... The one who ran to him with a smile was his admired stepmother, Kanna. Unable to hide his joy at the visit from his beloved, Yu spent that night celebrating with her... They talked all night, and their feelings resonated with each other. 'A present for grown-up Yu-kun,' Kanna said softly as she kissed him... And thus, he took another step towards adulthood―.
