Sunbae, You Don't Remember Me?

Yeonwoo is taken aback when he goes to speak with his Hoobae, who typically gazes at him with warmth and friendliness, seemingly wanting to get closer, but instead responds with a cold and harsh demeanor. After that incident, the hoobae continues to display an immature attitude towards Yeonwoo, slamming the elevator doors in his face and sticking post-it notes with insults on his back, exclaiming, "It's not like we're in elementary school I've had enough!" However, everything changes when Chaehyun (hoobae) suddenly breaks down in tears before an irate Yeonwoo after they are assigned to the same team project?! "The day after sleeping with me Sunbae you dined and dashed on me" What kind of nonsense is this?!