I don't know if a yaoi like this exists but I've read a lot love triangles and I wonder what they'll be like in a setting where it's acceptable to have multiple lovers. Sometimes it just seems like an easier solution lol.

Eh... Sex pistols maybe?

Friends like lovers?! 😕

[img]https://31.media.tumblr.com/fed8f641faa089fa16ee883f5b18f006/tumblr_n09tpwWCYW1qk16e0o1_500.png[/img]
K n e e l .... This is the difference between your and my eye-level.
Rai from Noblesse

Junk! Boys ?

Hm................. Thirsty for Love? Well, not exactly in a acceptable setting, but this manga is the only example I can think with "love triangle" been accepted by all the people envolved. You could try fantasies, like a prince with a harem, but I really don't know any other than Harem de Hitori.