warning alert for kakeguri, it is echhi like weirdly echhi the girl has an orgasm face each time she wins or is in the riskiest part of gambling XD but hey still a fun read
would also recommend liar game and Tobaku Datenroku Kaiji
both are gambling stories but way more dark and tense if you ask me
Edit= also 20th century boys is basically a masterpiece in thriller/mystery and has the ending in 21th century boys if you are going to read it