Kawaii Senpai no Kaigoroshikata
Nani mo Iwanai
Inuwashi Momo wa Yuruganai
In which everyone in this family is an Actual Disney Princess (yes that includes the guys) with yandere tendencies. Only one guy notices this, finds it hilarious, and decides to mess it up.
Shousetsuka no Shitsukekata
I wouldn't recommend this if you are looking for an actual romance. The novelist is a manipulative bastard and the editor lets him get away with far too much. It's very interesting from a psychological standpoint though. (and, you know, sexy times) edit: WOW AND I THOUGHT THE FIRST STORY WAS WIERD. all of these are very... dysfunctional relationships. They all have happy endings (as far as that goes) but uh... just make sure to read the tags first, okay?
Yuusha-sama Ni Ikinari Kyuukonsareta No Desu Ga
As I have described in my comment on this, it is literally a genderbent fantasy au of Yandere Simulator, if Senpai was a bit more self-aware (not THAT much more though). Take from that info what you will.
Suki ni Shitaiyo
well folks, looks like I'm back on my bullshit.
Yandere Hitotsu Yane no Shita