Eiji is kind of interesting as a main character but not at all likable, Naohiko is by far the better of the main characters but I guess following around someone "well put together" would be kind of boring after a while, I'm just glad he and Izumi show up from time to time to give some normalcy to the story.
If Izumi wasn't there, I would think Ikezawa would make a better pair with Naohiko but I guess she went after the problem child. Anyways I just hope the author will not create extreme drama between Izumi and Naohiko and maybe just focus on Eiji, Fujimura and the rest learning to move on.