Well, 'Sukisho' could be a good choice. It has similar complex character relationships and intense storylines as Ai no Kusabi. Also, the art styles might appeal to fans of the latter.
I'd recommend 'Junjou Romantica' as it shares some similar themes and emotional depth like Ai no Kusabi.
You might like 'Kirepapa'. It has elements of forbidden love and emotional turmoil, similar to what you find in Ai no Kusabi. The character development is quite engaging too.
A practical answer is Chapter 35, because it turns the idea into a concrete scene. The chapter opens with Shining Transformation Trip's filming location was set on the distant..., adds pressure through They even momentarily forgot the real reason they were squatting in her..., and ends on Brother.
Look to Chapter 48 for the clearest answer. It begins with He Yun felt guilty for initially ignoring Jiang Li on purpose, and with..., keeps building through That's why he gave her the Perfect Card right off the bat., and lands on Besides, everyone's phones will be replaced with special.
Chapter 44 is the strongest chapter-level answer because it starts from But the next move by the production team proved they hadn't forgotten the... and follows through on Does anyone here know how to drive?.
If you want the clearest chapter reference, go to Chapter 27. Early on, They had spent an entire year gradually inviting a few people.; later, the chapter leans on The pressure they endured during this period was beyond words..
The best chapter pointer here is Chapter 69, "Received Two Advertisements on the First Day". It opens with Since the phones issued by the program team couldn't log into Weibo, Wen... and closes on Wen Jiaojiao immediately hugged her arms proudly, specifically waiting to....
If you want the clearest chapter reference, go to Chapter 18. Early on, In the corner, a girl in a black dress sat quietly, holding a glass of...; later, the chapter leans on Her serene yet cold temperament, along with her exquisitely beautiful....
A practical answer is Chapter 55, because it turns the idea into a concrete scene. The chapter opens with Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had..., adds pressure through This person was even a top gaming streamer with tens of millions of fans,..., and ends on.
A practical answer is Chapter 24, because it turns the idea into a concrete scene. The chapter opens with Not only that, even the non-mainstream photos she had previously posted on..., adds pressure through Just because of his arrival, both were severely affected by public..., and ends on Shi Xu.
Look to Chapter 60 for the clearest answer. It begins with What's with Jiang Yan, treating his own sister Jiang Li like this?" "He..., keeps building through When Jiang Li found a place to live, she didn't bother with him either,..., and lands on And in traditional characters?" "What else?.