Masaru, is a second year Junior High student, and is undefeated in battle, He meets the Digital Monster Agumon, who has escaped from DATS, a secret government organization. Despite terrible first impressions, the two become best friends by talking with their "fists". With others, Masaru and Agumon work to investigate various incidents involving the Digital World and Digital Monsters, to try and get to the bottom of things.

• Soichiro Hoshi
• Taiki Matsuno
• Hirofumi Nojima
• Kazuya Nakai
• Yui Aragaki
• Yukana
• Rie Kugimiya
• Chie Koujiro