Ha-Joon has been crushing on Eun-Woo ever since they started college together, but he hasn’t had any opportunities to get close with him. At least they have a class together this semester: a lecture taught by the popular Professor Seo Joo-Hyuk. Hours after the first class, Ha-Joon remembers he left his assignments in the classroom. Upon reaching the lecture hall, he becomes witness and accomplice to a series of private lessons Joo-Hyuk is giving Eun-Woo—lessons that unleash his own deepest, riskiest desires. (Source: Lezhin)