This is the probably the first time I'm having a second lead syndrome.
It's not that I don't like senpai, I get where he's coming from, let's just say I knew what it was like living side to side w ppl like these, more often than not, they're kind of shunned by society. So it's not that he's being wishy washy and all, it's just so hard if all of your whole life you're treated as if you're a nuisance.
I think he's conflicted that if he ever reciprocates her feelings he's afraid that she might get the same treatment as him, while the chance of living normal life (post surgery) is right in the front of her eyes.
I'm rooting for the 2nd ml because I have a thing w black haired guys and also if FL choose him, most likely she'll face less problems in her life in the future than if she's dating senpai