Chelin Oh

The current girlfriend of Min Hyung Lee. She used to have a crush on Joon Sang in high school, but lost him to Yujin.

[Spoiler] She "lost" him again, after it turns out Min Hyung Lee has been Joon Sang all along, and in all the confusion he leaves her for Yujin while he slowly tries to recover his memories. [/Spoiler]