For me i like the story, the actors,the plot twist and i like their acting, and if you really dig deeper about the story line you will surely understand and love it,and even if how many times i watch it,i really never get tired of it ,at first when i watch it i got confused and i cant fully understand the story line but after i rewatch it i fully understand the story. As a long time BL / Yaoi fan i can feel that the main couple including the sides couple have a chemistry. And i hope the couples can play together again in the BL Series