KIZUNA: MUCH ADO ABOUT NOTHING

Enjouji and Ranmaru are a mostly-happy couple, but when Ranmaru finds lipstick on Enjouji, he becomes suspicious and leaves in a huff. Enjouji follows Ranmaru throughout the day. As they do so, the two men think about their past and their uncertain future. — Description from AniList community (anilist.co).