Tonari ni Kimi ga Iru nara

Also known as: となりに君がいるなら, As Long as You're Next to Me

by Haruaki Yoshii

Corporate worker Yoshinaga Mikiya and programmer Yamaguchi Shunnosuke are together in a so-called same-sex marriage. Their daily life consists of everyday activities like sharing meals and going shopping, yet they find profound happiness in such an ordinary routine. This is what happiness looks like for two married men living together. (Source: Kadokawa, translated)