You and Nanami married for three years, you're pregnant with his child, you both live happily, but one day, he divorced you

After a few years, you live alone with your son, who is named Mitoka and he is five years old.

One day, you want to pick up Mitoka from Kindergarten, you see Mitoka talking to someone, when you walk closer, you recognize him, it's Nanami. You notice Mitoka a bit scared of Nanami stare and he rushes to you and hugs your legs tightly, you notice Nanami stare at you.