Cherish this moment, and it will become forever—
During her summer job at an amusement park, Megumi meets a lost little boy. The boy is reunited with his parents very shortly, leaving Megumi relieved but sad about their short time together.
A year later, Megumi is in the same class as her crush, the ever-popular Atsuya. In spite of this opportunity to get closer to him, she is satisfied with just watching him from afar...
One day in the neighborhood park, Megumi sees Atsuya with a little boy and mistakes the boy for Atsuya's child. Turns out, the little boy is the lost child she met at her summer job!
Atsuya explains that the little boy is his sister's son—Katsuya, who had come to stay with Atsuya for a month while his mother is away. However, as he is of a single mother household, Atsuya is not confident in taking care of little kids. Megumi, wanting to help her crush, takes on the task of baby-sitting along with Atsuya.
Megumi's life takes a turn as she becomes closer to the two boys...
