I think Luca realised polygamy is not a part of Makoto’s culture/within his boundaries and is fine with that. For example when he turned that girl down, he told her he was dating Makoto (and therefore could not date her).
So they’re in a monogamous relationship!
Yep.. i guess he's saying that polygamy is normal in savanna. I think he's father is not in a polygamous relationship either
One of the main things about polygamy is the consent from their partner, it's just cheating if the other one isn't fine with you being with other people and Luca knows that. It's already implied that Mako isn't fine with that by the way he got jealous with the girls and Luca noticed and decided to respect that, actually a lot polygamous people are in a close relationship for the very same reason. Though imo Mako is open to try it if Luca open the topic, he seems very open minded about a lot of things and go with the flow most of the time.
Is the uke okay with polygamy? Cause Luca seems on board with it and they never talked about it... I feel nervous for the uke