December Rain
At first I thought it was a pretty average BL comic with romance and a sad ending like they broke up because staying together would be unrealistic BUT it kept getting better and better! Even though there were things that I felt should've been addressed (like the characters from Gusam's past) it also added to the uncertainty of the main character's lives; no one including them knew what was going to happen.
Massacre Happy End
BRO THE ENDING that was really fucking good I don't usually read mystery but the overshadow of mystery in this despite being the all knowing reader was well done. I thought it was going to be a basic slightly handsome guy gets bitches and kills people but nope that was just the start of it. This is getting intense holy shit
Death Note