Sakamoto, an unemployed young man, is one of the world's top players of an online fighting game called Btooom! One day, he wakes up on what appears to be a tropical island, although he doesn't remember how or why he got there.

• Suzuko Mimori
• Kanata Hongo
• Ken Narita
• Miyuki Sawashiro
• Yuichi Nakamura
• Toru Okawa