Responses

The only different between Taeshin and Haewon is, Taeshin just falling in love too fast and hard that make him easy while Haewon full of suspicion and rejection which intrigued ML to be interested in him. So Taeshin become a spare sex doll ML can lend to others while Haewon become his obsession to concur.
All in all, this is just a story of sick mfs painted in a good art.
But some are just expecting too much from the uke. It was very well made obvious that the uke doesn't care for Taeshin a single bit. So what made them think that uke will do some justice for Taeshin? It's also obvious that the uke likes the seme more than whatever relationship some readers thought the uke and Taeshin had. Atp, Taeshin's death was just a plot for the uke and seme to meet and I think(based on the spoilers I read as well), justice for Taeshin was never the main point.
Also, I think the only thing that makes the uke think of Taeshin is that the seme did it to Taeshin first, and is doing it with him again, the same way.