Three years after leaving home for boarding school to bury his feelings for his stepmother Yuka, adult graduate Yu sees her running toward him with a smile at his graduation ceremony, and all his old desire comes rushing back. That night, he takes the drunken Yuka to her hotel after their private celebration. Knowing how he feels, she kisses him and whispers, “A graduation gift from your stepmother.” With her guidance, Yu takes another step into adulthood.