Koga loves his papa; that's the truth. But what if someone loves his papa too? He hates it!

Rei and Keito divorced a long time ago, when Koga was still a baby. With Rei taking custody of Koga, they become closer as father and son despite lacking another parental figure.

On a fateful photoshoot, Rei met a new model who he thinks is his true soulmate, Kaoru Hakaze. He decided to introduce him to his beloved son; which resulted in Koga not wanting to come out of his room. From that day, Kaoru tries to win the little boy's heart, in which all of his efforts resulting in the same end every time.

One day, Rei has a photoshoot abroad that he cannot neglect. He asked Kaoru to take care of Koga for a week, which might be a good idea to bond with the little boy. Yet Koga is now sulking in the corner of the room, refusing to talk to Kaoru.