I re-read starting from ch.50-124. The freeloader works at Naruse’s company as a newbie and he also goes to the same university as Kouya. At least he did in ch.50. Either way, he sucks and needs to get his personality upgraded.
I also noticed in my re-read through that there is a lot of joking around about Kouya being so into kids that he could be doing the unthinkable with a child and I find it HIGHLY disturbing that his friends would think that was a laughing matter. We know that Kouya is NOT like that, thank god, but I wish the author would chill out with that disturbing topic.