Yuji lives in a student dormitory and lives his school life. Three years pass in the blink of an eye, and graduation comes... On the way home, Yuji feels a little lonely at the graduation ceremony without his family, when his stepmother Maiko comes running up to him with a smile. He is Kokoro to celebrate alone with his stepmother, who he feels more than just like family... Maiko gently wraps it up as "a present for you now that you're an adult," and Yuji takes his first step into adulthood.