Koi Ni Nare!
A student struggling with his sexuality it set up by a friend with someone who turns out to be his dorm supervisor and teacher. *Spoilers* I appreciate this story because the issue of the teacher/student relationship is discussed, and both people wait until that is no longer their relationship to take their personal relationship further. I think the student is underage, but he lives in the dorms, so I'm not sure. In America, we're usually 18 when we go away to college. This story has a spin-off about the roommate!
Haikyuu!! - Pinky Promise with My Boyfriend the King (Doujinshi)
I found this story here on MangaGo in 2017 and missed the doujinshi tag, so the first time through, I thought it was just a really well-done one shot about two volleyball players, with a surprising amount of world-building blended in pretty seamlessly. Having zero context for the characters or situation, I followed along with no problem. Several months later, I ran across another DJ with these two and said, "...wait. Is there a volleyball anime I don't know about?" A Google search and trip to Crunchyroll later, I had my answer. I've since watched Haikyu!! and it has become my absolute favorite anime series. This DJ was pretty in-character and beautifully drawn. I want to give Suga hugs. I want to give them all hugs.
Sono Te No Netsu Wo Kasanete
The one with the ceramic artist and the restaurant owner!
Oka no Ue no Rakuen
The first several chapters are sweet. The final is a sad, sad, sad, sad, sad but lovely story that had me crying.
Seven Days