It does have a bunch of threesome with the twink but it doesn’t show all. It just says they’ve had threesomes because the twink basically coerced the black haired dude to. But the twink isn’t the main focus, he’s just a side.
The main couple is black haired dude (Bottom) and the light haired dude (Top). Definitely not a throuple ending, the ML/light haired dude doesn’t seem to see the twink as more than a hole to use despite being fuck friends for a decade, and he spoke badly of the twink too, calling his body a lowly body//aka slut.
Meanwhile the black haired dude is into the twink and is going with the threesomes for the twink. The black haired dude and the light haired dude has not fucked yet.

is this a threes0me or…? i’m kinda hoping the twink is out cause i hate phony people, but if they are all staying together i might drop