The Transfer Student Who Came Down to Earth

It's Christmas Eve. Failing to confess to his sunbae Yu-Ji, Gyeon-U meets a boy dressed in a space suit who's fallen like a shooting star. It's been a month since he's taken care of the strange boy who has nowhere to go, and today is the day of the high school entrance ceremony! Gyeon-U is excited to hear that he's attending the same school as Yu-Ji, but a transfer student who looks ex.act.ly. like Yu-Ji appears in front of him...

(Source: peanutoon, translated)