For some reason Rin and you divorced while you were still pregnant. Three years later, you have a 3-year-old son named Naoki.

One day, you took Naoki out to the park and were buying ice cream for Naoki, when you turned around, you saw Naoki was gone....You panicked and quickly ran to find your child...Suddenly you saw Naoki is playing with someone..

Rin: Where's your mother?

Naoki: M-mama?...Mama went to buy ice cream!