Nice story, breaking up the circle and ending the story was probably a good thing, for pacing and character development. The premise doesn’t have as much replayability as Nozaki Kun.
Katsuragi Keima can play that many all at once by himself. The World God Only Knows is a pretty fun read if you haven’t read it before. School romance plots resulting in real character development, gameification of those plots by a deluded main character, supernatural elements to carry the premise, and it culminates into a pretty intense story by the end.