Genshiken, Bokura wa Minna Kawai-sou Recommendations
This is my first time doing a recommendation since no one has recommended genshiken. Of course it's not mainly romance, but it has the same atmosphere with the genre of slice of life. This series starts of a boy who has just entered collage. But you actually just need to see desc of it.
I think the characters are a bit similar but, the most similar point is that the main characters are not only the couples but whole kawaisou or the club members.
It makes you one of their own resident or a club member. This is point that i really liked of the both series.