Teruki Maeno

Kōki and Yuki's only son, who first appears as a child in episode three and becomes the male lead in episode four. Some time between episodes three and four, Rin saved his life in a car accident, and he states that he felt watched over and protected by her ever since. Their formal introduction happens in episode four, when Tamotsu brings him to Asōgi Consulting due to his involvement in the Ruon case. He appears again in episode five, now the CEO of Maeno Holding Group company, with a teenage daughter named Mishio. From Wikipedia.