Chapter 77 serves as a pivotal moment in the series. By this stage in the narrative, the "edge" mentioned in the title is no longer a metaphorical boundary but a physical and psychological reality for the protagonists.

When terebinoona and maknuna assumed production duties for Season 3, the aesthetic language shifted. While keeping the core tension intact, this era introduces more polished artistic linework and accelerates the pacing to deal with the long-term consequences of the characters' actions. Analysis of Chapter 77: The Turning Point

A to similar psychological BL manhwas like A Tree Without Roots or Passion The Edge of Ambiguity: Exploring BL Manhwa

The Edge of Ambiguity (also known under regional variations like 모호함의 언저리 ) is celebrated for its gripping, high-tension approach to toxic dynamics, social inequality, and psychological manipulation.

To better understand what you're looking for, I'll try to break down the title into its individual components:

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Your long keyword can be broken down into several parts that point to a potential web novel or fanfiction based on the above manhwa:

Good vs. Evil is replaced by Survival vs. Desire.