Red Candy

Shi-Hyeon, aka “Red Candy,” is a secret agent whose code name comes from bathing in the blood of his marks on dangerous missions. Shi-Hyeon's tasked with seducing and obtaining intel from Ha-Jun, a hot college professor. Shi-Hyeon can disarm enemies, but didn’t expect to be disarmed himself by Ha-Jun’s own tight body. Now Shi-Hyeon's caught between loyalty to his spy agency and Ha-Jun. Can Red Candy survive the incoming wave of enemies and still indulge in the sweet ecstasy of Ha-Jun's embrace?

(Source: Tapas)
Note: Chapter count includes 6 side stories.