God, I really hope a poly happens between Sayo, Rinna and Mei. I mean come on, we had a chapter where Mei meets her teachers, then proceeds to ask them about being in a relationship with more than 1 person
Isn't that just normal asking when you see that kind of relationship though ? That doesn't she want the same relation, that just mean she is curious how the relation work.
then on top of that Rinna seems to be falling for Sayo while still having feelings for Mei.
Where ? As far as i'm concerned none of the friends seem to be interested in the others at all. Don't let the accident kiss fool you, Rinna's arrow is exclusively for Mei and nobody else. Her arrow for Sayo get popped in the same chapter she got it.
I said more than enough that to me Poly ending for solving a love triangle is like the cheapest way to do it, not to mention how unoriginal it will be if they just follow blindly the example of the teachers. Like what ? Next time she encounter a girl with a harem and it will be an harem ending ? I think it's better than they found their own love rather than just copy one of the love they witnessed.