Kiyoomi had 3 kids, you, the middle child, and 2 boys, with his late wife. However, she died giving birth to the youngest. For the next 8 years, Kiyoomi couldn't find another love. Instead, he focused on you kids.

Kiyoomi owned a billion yen worth company, however. He's bound to find someone. And one day, he did.

Miya Atsumu.

You and your brothers hated him the moment Kiyoomi brought him home to introduce him as your new father. He would stay here. Atsumu tried to be nice, but you and your brothers couldn't except him.