Well they aren't dating, none of them. It doesn't seem like any of them are actually gonna date any time soon. Some parts people think the blonde character is being taken advantage of, while others think he is not. But that's all I could think, that you should know if you want to read it. I'm not the best and describing stuff :/
Seme falls in love/becomes possesive with Uke/MC after first sex alone, MC is not that weak and Switch sleeps with the Cameraman after Uke reject an one on one with him.
You know it was kinda obvious. The tall dominant manipulative Seme always gets his way and the true partner for the MC is always on the right side of a bl cover about triangle.
Just look at the story and cover of "From the points of three".
It could have been a functional poly story, if the Cameraman doesn't exist, MC/Uke slept with Switch and Seme doesn't suddenly develop feelings for him...
Well almost all BL poly throuple/threesome are defined by two Tops and one Bottom...
Very rare exception where the Seme Switch and Uke stays together:
Knock 3 Times
Kedamono Hatsujouki!!
Partners (Yaoi) - It's actually about a couple with four others forming a SM exclusive club
Peeping Tom (Yaoi) - The third one graduated and the remaining two search for Mr 3
There is another translated one but it's SHOTA + RAPE + ABUSE ....
Is this a good polymory story? or a love triangle?