How tf is he supposed to be the second love interest after shooting gunmu in the thigh

He's supposed to be a love interest??? not a foe/"imma get my brother back" side plot???

It's sort of a mix of both with how this is going. Seems like Jin is going to want our MC for himself entirely but right now, it's hard to tell if it's only platonically and/or sexually.

I've seen people who read ahead in the raws saying it looks like pseudo incest so I assumed