@HASE0LAR
she is older than her brother but not by much. And yeah she should be around 19-21, I think. It's a bit iffy but they haven't started dating or anything. It's just a crush on both their parts.
I can't help but feel that if their genders were reversed they wouldn't be any hesitation to declare feelings. Which I always thought scummy when older guys wanted to date high school girls but I was also always told it's not a big deal, girls mature faster than guys and he was a senior and she was a freshmen when they met or they could get married anyways...yeah that totally makes it normal and oka