Doushitemo Furetakunai
I really like how the relationship developed between Shima and Togawa. Togawa treats Shima really kindly and is straightforward with how he feels which I love. There are some small miscommunications and misunderstanding but it was dealt with in a healthy way. Second couple: Deguchi and Onoda. They have a pretty good relationship too.
Otona Keikenchi
I like the main couple, Shinkai and Yumeji, more than the second couple Maru and Mu. Shinkai can be a bit blunt and cold towards Yumeji, but he realizes this and it looks like he is working to get better. However, Maru is very mean to Mu.
Kuro X Koi
It was actually easy to tell the twins apart lol
Starting Today, I'm a Delinquent Slut!?