I check the author's X and based on some comments it looks like the Love and Blanca side story hasn't appeared yet cuz at side 14-15 they both have short hair
thats cause ch 13-15 is a flashback. it really is speaking to how past Gitae is feeling regarding his situation, and is probably hinting at how present Gitae will react to what happened in ch 12. guessing from his hair length, at least 2-3 years have passed between the events in ch 13-15 and ch 12.
The ending was perfect ngl