Koga Kouhei

He is a company employee who has been in the workforce for three years.
He fell in love at first sight with Tsumugi when he was in college, and his courageous approach bore fruit, and they got married upon graduation.
He is a smart and capable person with a good personality, but his only drawback is his lack of physical strength.
He is aware of this and has been trying to improve it, but has not been successful.