All roles are performed by adults. Around the time his father remarried, Makoto enrolled at a boarding school. His happy school days finally end on graduation day, and while he is walking home expecting nobody to meet him, his stepmother Aya runs up with a smile. Makoto cannot hide his joy at reuniting with the woman he fell for at first sight. They celebrate his graduation and make up for their time apart until Aya gently presses her body against his, saying, “This is a present for you now that you're an adult.” The experience takes him another step into adulthood.