It's about two students in the same class who realize everyone but them is in a relationship. They are kind of forced by their classmates to go out with each other, even though they don't particularly like each other.
I remember the cover of one volume being the two main characters in front of a class board. There is also an otaku couple (one acts openly, while the other is a closet otaku).
I read this manga once and really liked it, but can't remember the name.