• Kiss mark delivery - EunHae, PG13

Hyukjae is a college professor who loathes February 14. This is where that impossibly sweet guidance counselor comes in.

• Center of gravity - KyuMin, PG13

There’s a new teacher in the university and Sungmin is tasked to evaluate him.

• Sweeter than 3.1416 - KyuMin, NC17

The day after the evaluation, everything just went haywire for Sungmin.

• More special than relativity - KyuMin, PG13

Sungmin wants to clarify something about Kyuhyun.