Chapter 90... I should find out what happens in that specific chapter. Let me recall. From what I remember, the story has been building up the relationship between K and J, with K being more dominant and J more submissive. There have been many episodes where their relationship dynamics are tested, with J often being manipulated or controlled by K's past.
Need to check if there's a particular scene or quote from Chapter 90 that's impactful. Since it's a blog post for fans, including some spoilers is okay but make it clear. Maybe mention the build-up to the chapter, how it ties into previous events, and what comes next.
I should also mention the popularity of the series and why readers are so invested. The complexity of the characters and the emotional depth make it a compelling story. For fans, Chapter 90 might be a pivotal moment that cements their emotional investment.
I should also touch on the setting of Chapter 90. Does it take place in K's mansion, as previous chapters do? The isolated setting might contribute to the tension. Maybe a specific scene happens there that's crucial for the plot.
Another angle: the author's intent. BTOei is known for complex characters with psychological depth, so the chapter might delve into their psyches. The title might reflect a twist or a betrayal. Also, note the typical elements of the BL genre in the story—passion, drama, emotional conflict.