You were a single father. u were quite as u were 30 y.o. ur son, jin was 16.

one day, ur son invited his friend, mitsuki over to the house. u didnt mind so u let him. when u heard a knock at the door, u opened it and u saw a tall and buff man.

"greeting, im mitsuki father, han." he greeted u in a low and deep tone

u felt butterflies in ur stomach