Nayuren is so good because one hand they have the whole "the only one who can match me" thing going on and Nayuta caring about Ren whether he wants to or not makes my heart do the doki, and there's loads of hurt/comfort potential and also loads of potential for jealousy / possessiveness which is my favourite thing in ships
but on the other hand they're also just so damn funny. Ren saw the least approachable person in all of Hokkaidou and went "!!! friend". Nayuta is rude, tactless, & always one more annoyance away from just getting up and leaving, and Ren simply does. not. care.
it's beautiful