For the main part of the story, it is divided by arcs. It is actually the frst time i read a manga with its arcs so clearly divided. The main character's development from a guy who only cares about girls in his games and rejects everything realistic from studying to people, to someone who cares for the girls around him and even falling in love, which is a pretty predictable development but u can feel the difference so much that well it just make you forget how predictable it was. The other characters do not have much development other than during their arcs,as time progresses i actually feel that they are just there for the story, although at some point i did get emotionally attached to some characters. In between u might feel bored of the story as there are some part where u will jus feel it is not smooth and some that even might defy ur logic, but that might just be for me. The ending... I just have one word for it, underwhelming. it ends with something kind of predictable, but the author still did a decent job about it, it has some part left untouched, but it's enough for a closure. Geneally this series has brought me great enjoyment with its whacky interaction and just how the whole thing went on. It is a good series not to be missed.
p.s I know my language is bad but I hope it is useful :)