After completing his time as an adult student living alone in a dorm, Yuu is ready to begin the next stage of his life. On graduation day, his stepmother Haruka—the woman he secretly loves—runs toward him with a smile. They celebrate together, but the unguarded Haruka drinks too much and passes out. Yuu suppresses his desire and takes her to a hotel safely. She has understood his feelings all along, however, and gently kisses him while offering “a present for Yuu, now that you're an adult.”