Tell him - nomin

Jeno is a CEO and father of 8 years old Jisung. He tries to get closer to him but after two years of awkwardness it's hard. Jaemin, elementary school teacher, comes to the rescue and helps both father and son regain their relationship and not really knowing when build a new one with him in the middle.

So basically best boy Jaemin gets himself a family that he never had but always wanted.