
Can anyone recommend another bl manga/hwa/huas like this one? I mean in term on how emotionally draining the story is.

For sure! Some BL's I'd recommend that personally made me cry is Pearl Boy, A Home Far Away, December Rain, The Pizza Delivery Guy, Dangerous Convenience Store Love, and Missing Love. Now mind you these are extremely dark so read with caution.
Some one shots that will leave you BROKEN are Asagao wa Yoru kara Saku, my childhood friend was a god, Kosha Ura no Natsu. They are a bit more tame than the ones I listed but nevertheless they are angsty. Happy reading!

This is one of the most interesting BL I read in a while. I just can imagine how the emotional complications will emerge along the way. Kinda reminds me of Ang Lee's Lust, caution. The protagonist & antagonist grows to have affections for each other, while still have to maintain their initial motives (one to take revenge, the other one to protect his power)
Anyone got any spoiler or link to the raw?