Sand Castle

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 with a fondness like never before. Will this relationship work with the two boys' positions now completely switched?