Gaaaah, typically I would be so for a poly ending, but the leader and the youngest give me ick vibes.
I'm rooting for Taeha all the way. Although, I have zero clue how they're going to come back from all being intimate with him and keep being a group. It's also feeling poly-coded with the MC's open door behavior.
It's not fun when it feels like there's no agreement and obvious open hostility.