Emergency Stairs

Haejin is a buttoned-up office worker whose marriage is going stale. However, sparks are flying at the office: his boss and an attractive coworker have a secret bond, and Haejin himself keeps running into a cute intern. One day, Haejin discovers an anonymous 18+ advice forum where someone alludes to having a crush on him. Will he stay his usual path, or try taking the emergency stairs for once? (Source: Lezhin US)