
If you're looking for manga similar to Kaiji Gaiden, you might like these titles.
The story of two small-town high school boys and best friends, both striving to escape from their suffocating lives in the close-minded hamlet.
Eshikawa is a man who has lost sight of his life and stumbles through it, with no clear meaning or purpose. One day, he is informed that his ex-girlfriend committed suicide, which sets his brain on retrospect mode. He goes on a journey of self-revelation and contemplates upon the myriad of human emotions, the joys and sorrows of normalcy.
Nomura has always had a problem looking people in the eyes, and as an adult he is constantly reminded of how frightening things can become if you do so. However, when he’s brutally beaten by a random gang and wakes up in the hospital, Nomura realizes his true terror is just beginning: he can no longer see the eyes on anyone’s face!