Of all the lower-than-pop-psychology terms, "beta" has to be the stupidest most bullshit one I've ever seen, both in terms of the crappy misleading ways it evaluates people and the moronic frame it puts on things in the first place; the way it's a bad analogy from bad science is just kind of the maraschino cherry on top.
i usually hate the rivals or second leads in these type of things but i dont think ooya-kun is THAT much of an asshole, even if he's not serious about anything at least he's directly nice to her and at least he's honest unlike edgelord tsundere bitch boi who doesn't even know what he feels anymore lmao
i don't think she should be with either of them but at this point ima say rental kareshi still acts the least like a dick out of the two so ¯\_(ツ)_/¯