The Transfer Student Who Came Down To Earth summary:

It's Christmas Eve. Failing to confess to Yuji Sunbae, Gyunwoo 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! Gyunwoo is excited to hear that he's attending the same school as Yuji Sunbae, but a transfer student who looks ex.act.ly. like Yuji Sunbae appears in front of him...+