There will be an option when she returns from her trip. That's not for a while yet, though.
Oh thank God, no offense to those who like her character, but that's the one pet peeve I have, being forced to romance a character I have no interest in.
Update: So I'm 4 chapters in and while I still don't like the idea of Su-Jin as our already established girlfriend, I'm pleasantly surprised she's completely out of the picture/story... Here's hoping she finds a family member to fall in love with while visiting her parents (inside joke from right before she leaves) and decides to stay in Korea.
Just finished volume 1, it was great btw, but volume 2 is amazing 4 chapters in. So far, I think Danni is the only one who I preferred her look in volume 1. Honestly cannot wait for the updates to keep coming, great story with a MC that isn't a complete dick while trying to spread the love around. I'm hoping given the conversation we have with Aunt Kate about Rebecca, there's still an option to pursue her as a LI while still 'playing' with the others.