Mie Hariatte Surechigai
Complete | yukue moegi | 2000 released
These stories were funny, but I didn't feel particularly connected to the couples (the second was my favorite though).
The Last Lover
Complete | Psyche Delico | 2014 released
Hitotsu no Koi no Hajimari
Complete | Ikuta Mugi | 2000 released
Liked the second couple more than the first. The first couple bored me so much I don't even remember their plot line.
Restless Webtoon