The Decagon House Murders is the challenge you've been waiting for. This is a story that doesn't just invite you to watch; it dares to make you think. It's a 'Fair Play' mystery in the truest sense, where the author puts every piece of the puzzle right in front of your eyes, and the frustration isn't from hidden information, but from realizing that all along you've actually been seeing the truth, you just haven't been able to recognize it. Remember Agatha Christie's And Then There Were None?

The narrative is split into two different parallel nightmares. On the island, the students find themselves trapped in a terrifying 'survival game' where they are killed one by one. On the mainland, two other characters—a former club member and a curious friend—begin to receive strange accusatory letters. They try to solve the mystery from afar, acting as 'armchair detectives' while time keeps ticking for their friends across the sea.

What I like about this manga lies in the dynamics between The Victims and The Culprit. The Victims are not helpless NPC, they’re mystery fans. Theirs intellectual and analytical, are top notch. They treat the initial threat like a game, analyzing the crime scene with cold logic rather than fear. This makes their eventual downfall feel even more satisfying—and terrifying. You watch their walls of logic collapse, replaced by primitive panic as they realize that their knowledge of mystery novels can’t save them from a real killer.

Opposing them is The Culprit, a criminal who operates with the precision of a surgeon. This character isn’t a monster with physical strength but a logic magician. They operate in plain sight, blending into the background so when they finally strike, it doesn’t feel like an attack—it feels more like a sneak attack, maybe a magic trick! The Culprit flipped the students' own arrogance against them, using their assumptions to hide the knife until it was too late.

The art, the visual, is awesome. The characters are delicate, beautifully drawn. Contrasts with the brutality of deaths. The author pleases your eyes, from panel to panel, pages to pages, while the clue quietly sits in the corner. Unnoticed until you read the end of the manga.   

The reason why this genre is considered legendary revolves around one moment near the end. The Twist! It's a plot twist so simple, yet so devastating, that it makes you reevaluate every conversation, every panel, and every assumption you've ever made.

Cold, calculated, and mathematically precise. This isn't a story about emotions; it's a story about perception. It doesn't mess with your feelings; it messes with your perception.

Although The Decagon House Murders manga is an adaptation, still, this manga pleases me. Should I read the original novel?