Elementary school student Dan Ohno (大野 弾) shares his home with the naive but well-meaning Shirobon, who's constantly challenged to bomber duels by his sometimes-friend-sometimes-nemesis Kurobon. The trio get into shenanigans ranging from the mundane - Dan being stricken by a cold - to the far-out, like Hige Hige Bandit #16 revealing some nefarious scheme. Pretty Bomber frequently shows up to keep an eye on the two Bombermen, and resolving the situation if need be.