Am i being sensitive

First of all, i don’t enjoy romance aspect in these type of action stories at all so my personal preference is influencing my feelings a bit. But also isn’t Jiwoo a minor?? Or was a minor when he met Jiyoung. Im 18 myself and this is just me but dating smn like Jiyoung, who at the youngest is probably 21 is still kind of weird. I do enjoy that they have properly developed relationship that establish their dynamic but it’s still icky to me.
Gestella and Kayden for example, both their strength level and their level headedness are on the same wavelength so i don’t mind it as much, even though i still don’t particularly enjoy romance in action stories, but jiyoung seems so much more mature than jiwoo. Not to mention he’s her younger brother’s friend. Idk maybe im being sensitive, i feel weird seeing them in a ‘relationship’.