Just the MC dating the two of them with the two ML being aware of each other, I was not aware there’s a different term for a person that dates more than one partner, I thought that was poly lol. I guess the proper way to look at this relationship is harem where one person gets all, and this is the case with this story
Honestly there’s two different words that start with poly (polyamorous and polygamous). What you’re talking about is that you like polyamorous relationships. As opposed to polygamous relationship where it’s normally one person being with multiple people. (Although the meaning is a little blurred since it usually involves marriage). Honestly in this case, the only polyamorous person would be the mc, since he likes them both romantically. Whereas the two MLs, like you said may be more into an open relationship (though likely is just okay with the other being with mc, and not anyone else joining). So open relationship is still a blurry word for it since usually everyone would have to be able to date and see anyone they want, including the MLs.
I bought the last episode. It’s a poly. The three of them ended up dating each other