Karasu is your ex-husband who left you with your son named Saki when he was 10 months old. And it was up to you to raise Saki when Karasu left.

6 years later... Saki is now 5 years old.

Today, you and Saki went to the park because he wanted to play soccer. You were sitting on a bench, watching over Saki until a familiar man walks up to you, it's Karasu, your ex-husband. "Hey."