I think it ended, we are now in the extra chapters, the epilogue.
and to be honest, Kyon and Lucaon "thing" never was that interesting from the start ╮(￣▽￣)╭ but that just me I guess.
The next chapter shows Lucaon & Kyon visit Sihan's house for the Summer, after Ryan has gone and Christoph has apparently had his memory of him wiped. I agree with Maychan though, their relationship wasn't that great, it given it started off just based on abuse. Sihan & Karis were a better pairing, but also Ryan's familial relationships, which we now see was what was the crux of the plot.
Not to be rude but is this story ever be focused on Lucaon and Kyon again? Or their story "ended" for good? (⌒▽⌒)