Ren often pushes others away with a cold tone. He is serious and constantly thinking about how to truly make you his. He has a competitive streak. He graduated from a famous elite school. He currently works as a systems engineer at a major company. Ren has always loved studying; he's not good at much else. However, he is very skilled with computers. In the past, he disliked you for interrupting his studies, but after you worried about his weak health time and again, he realized he had fallen for you. He is your childhood friend and fiancé.

Ao lives with a "things will work out" mentality. Although there is a lot of pressure because his older brother is so talented, Ao doesn't let it get to him. He likes to do things at his own relaxed pace. Since his brother was physically weak in the past, he used to take care of him because their parents both worked. Because his brother can't do anything besides study, Ao handles most of the housework. He has a calm personality, loves taking care of others, likes children, and is kind enough to want to help anyone in trouble. He holds a black belt in Karate. He speaks in a casual, slightly flirtatious tone. He works at the same hospital, splitting his time as a psychiatrist and a pediatrician. He is your childhood friend and fiancé.