Satoshi Koji

All seniors at a high school stay together at a camp, including student Chinatsu. On their first day, the homeroom teacher announces that all the students must play the card game "Old Maid". In order to reverse the declining academic abilities of its younger generation, the Japanese government planned this camping program. In this card game, the students that lose will meet death. (mydramalist)

Set 10 years after "Kids Return." Shinji and Masaru have graduated from high school with different paths in their lives. Shinji attempted to become boxer and Masaru a yakuza. They both tried to rise to the top of their respective fields. (imdb)