One of the main characters has a girlfriend and will develop feelings towards a guy. Other stories, BL or not will also be told throughout the series.
Aim who played Plern Pleng, Knock's girlfriend... now ex will be part of What the duck. She is also the girlfriend of one of the guys but different from TWM's Plern Pleng, she has a story to follow. Not someone who plays the villain between two guys.
Both has the same format of having several stories on one series. The core story following two guys developing feelings toward each other. With other stories connected to the main characters.