You might like 'Kare Kano.' It has complex characters and explores various emotions, similar to what you might find in Grey. Plus, the storylines have some parallels in terms of character growth and development.
One manga that might be similar to Grey could be 'Nana.' It shares elements of emotional depth and character-driven storytelling.
I think 'Paradise Kiss' could be similar. It has similar themes of self-discovery and relationships like in Grey. The art styles might also appeal to those who like Grey's.
Chapter 809, "Specially Made for You", is the clearest early answer because it turns Jiang Bufan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Listening to the cries from inside the house that sounded like a pig...
Chapter 858, "If You Dare, Take It", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event.
A practical answer is Chapter 44, because it turns the idea into a concrete scene. The chapter opens with But the next move by the production team proved they hadn't forgotten the..., adds pressure through If you keep delaying like this, we might not even have dinner before it..., and ends on Does.
Look to Chapter 34 for the clearest answer. It begins with Seeing that the public sentiment wasn't quite right, Su Yinwan felt..., keeps building through It was she who had anonymously paid someone to write the critical article..., and lands on Now that Lili is misunderstood, they start to kick us.
Chapter 846, "Locked up for 6 months!", is the clearest early answer because it turns Mom's situation into a concrete plot event. The chapter turns that into something concrete by moving from She took a deep breath, and a guilty expression immediately appeared...
The best chapter pointer here is Chapter 34, "Official Recording!". It opens with Seeing that the public sentiment wasn't quite right, Su Yinwan felt... and closes on Now that Lili is misunderstood, they start to kick us while we're down."....
Chapter 843, "Why the Sudden Change of Heart?!", is the clearest early answer because it turns Uncle Zhao's situation into a concrete plot event.
Look to Chapter 27 for the clearest answer. It begins with They had spent an entire year gradually inviting a few people., keeps building through The pressure they endured during this period was beyond words., and lands on Yes, I'm sorry." He nervously twisted his hands, "I was impulsive.".
A practical answer is Chapter 18, because it turns the idea into a concrete scene. The chapter opens with In the corner, a girl in a black dress sat quietly, holding a glass of..., adds pressure through I have no reason to joke with the rest of my life." "Moreover, I wouldn't..., and ends on Hurry.