Sand Castle

Sand Castle summary:

Eunsung walks in on his crush Jiwoo in an empty lecture hall. Their shared secret brings the two closer, but Jiwoo is only interested in using Eunsung only as a means to satisfy his desires. As Eunsung grows tired of Jiwoo’s selfish ways and has a change of heart, Jiwoo realizes his feelings for Eunsung and begins treating him with a fondness like never before. Will this relationship work with the two boys’ positions now totally switched?