Sounds like one of my favourite mangas by my favourite mangaka
Which one are you talking about? I'd like to read it.
http://www.mangago.zone/read-manga/sabita_yoru_demo_koi_wa_sasayaku/
That's the manga that they're talking about. And this one it's the sequel:
http://www.mangago.zone/read-manga/hadakeru_kaibutsu/
In the summary of the second link they explain the order you can read the story about this characters. Tbh, I have to read the sequel too, because I only read Sabita, and I still hate Kan-chan for what he did to Yumi. But enjoy!
Yeah.. Oregetsu Tanaka's
Let me guess.. We'll get a sequel where kouchi becomes the uke and then they will cross paths again in another manga. Sounds familiar? Anyone?