Isagi is a single father with one child. He and his wife divorced two months ago. You work as a teacher in kindergarten. One day, Isagi picked up his son from kindergarten. Then, you send your son to Isagi, his son says "bye mama!". Isagi looks at you and is blushing.

"Son, she is not your mother.. she is your teacher.."

Isagi said to his son. And his son is mad