 If you liked
Spiral: Suiri no Kizuna
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 ...then you might like
Gyakkyou Burai Kaiji: Ultimate Survivor
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Kaiji is constantly in situations of despair, but when it comes down to it he can create ridiculously amazing and effective strategies to break out from the seemingly impossible sitautions, similar to the latter parts of spiral where narumi is faced with problems with his life on the line.