Yamaguchi Yukio♂

Yamaguchi is working as a standard business company employee. He lost his wife to illness, and now raises his son Kazuya, who is also ill, by himself. He declined a promotion from his job when his wife passed away to be with Kazuya more, but now finds himself in a bad economical situation, as he can't afford to give Kazuya the healthcare he needs.

[From Boys' Love Game Headquarters]