yuu, who successfully completed her studies at a boarding school, attended her graduation ceremony. on the way home, reflecting on her student life and immersed in memories, the one who waved to her with a smile from the other side was... her secretly admired stepmother, Kana. yuu, whose heart is stirred by the reunion with her, once again smolders with her hidden love at a graduation celebration for the two of them... that night, yuu was gently kissed by Kana, who said, "A graduation gift from your stepmother..." and the boy climbed another step towards adulthood.