Shounen Houkokusho

Harumi is living with his lover, Ryouichi, and his son, Shuu. The three of them are having a happy every-day life when someone came to talk about a marriage interview for Harumi?!
This is a one-shot manga that serves as an extra story of the popular novel, “Love Certificate (Renai Shoumeisho),” also written by Sakiya Haruhi with illustrations by the same Machiko Madoka.