First things first, there are SPOILERS!!!! now then onto the story. I can say that I actually enjoyed this series it was a nice little kick back read I admit that though the ending was little predictable (given that "Riko's" body was tossed in the pit. However when it come to the "psychological" science in the series its basically just drawing out survival of the fittest and or the pressure to win the heart of the mc (which is personally a great idea). Which was different approach, but it really doesn't drive the story into the rabbit hole that it could've gone to. The ending was actually pretty nice, I wont lie there are few series that kill the mc and I'm proud that Touka pulled through with not letting the mc have immortality or in most content letting them win. There are a few complaints with the character development though I will admit, one of them being not exploring "Riku's" personality enough though, Touka explained the other female characters reasons and traits to survive that wonderfully mixed well with characters and motives. Another flaw was there could've been more depth with "Riku's" personality as far as the pressure he was in as well though he chooses himself which wasn't the worst ideas, but it definitely could've gone deeper in "Riku's" emotions. moving forward into the positive things. was the wonderful character development in "Haju" "Riku's" childhood bestfriend for the sake of well jealousy, obsession, and couple other traits that Touka was going for in making her into a true yandere (well the most of them all). Though im sure this was a 1 shot anime the pacing is pretty well until the last few of chapters. Another thing that was questionable was "Riko's" appearances, throughout the story I respect that she mainly popped in the Asylum scenes but the most aggravating part was when they just let her go TWICE after attempting to kill the characters. anyways that was my first impression of the manga and loo forward to writing more reviews.
Thank you for your time.