[DrillBIT]

With Bucchi this Rider could be the funniest yet darkest series at all time.

Basically street kids with no life lives in a new town under the control of a gigantic cooperation "Joukamachi".
They use street dance to release their stress, and use Lock Seed to summon "Invess", a small animal, to do war games in a different dimension. "Invess" opens so many doors in different places, brought over monsters, and lead to chaos. The reason for monsters showing up is unknown.

Kasuraba Kouta stands up for the human race as Gaimu against the catastrophe, and so are his rivals.
Everybody fights for their own justice, just like the Warring States Period.