This one's unique, a bit dull in story but it is interesting to read. It's rare to read a bl harem. That's like poly.
Basically the uke attracts guys, and this 4 eccentric guys gather to hangout with him. They have sx with him, time to time because of this attraction they felt to him. But the uke wants them to be normal friends even though they are clearly having sex so they aren't normal. And then, the semes made it clear to him that they ARE sex friends and that got the uke kinda depressed. Cause he wants them to be more than just that.
In the latest chapter (6) he wants to find a lover. Honestly, wanted to see where this goes but it's unfinished. Not sure if it's the translation that's not or the series itself is cutt off. Too bad it's last update is 2017, and I doubt it will be updated.
Future me, if u have money. Look for this if it has continuation then read it :))
Bokura To Usagi No Koi Wa Sensou