Cage Of Eden
Gotta be honest. saw the ending waaaaayyy before they even got to start piecing together the building locations. but I honestly hope that it wouldn't be like that. too many fucking plot holes. I wouldn't call that open ending. that's a 'fuck this. im tired. lets end this already' ending. no resolution whatsoever. vague romance hints at the end. if one isn't critical, it was really great. the early plot twists were good. had be hooked for weeks until I caught up to it. the character progress was a bit rushed since they really have to. plot progress for the first volumes was great but by the end it was really rushed. one too many information in one sitting. the trivias throughout the manga was kind of useful. the psychological aspect of the manga forever changed me. one of the best underrated manga there is.
Darwin's Game
Kaifuku Jutsushi no Yarinaoshi
Incorrigible
Ayeon's Story from Never Understand
Apocalypse No Toride