Taruto Mix!

is a japanese 4-koma manga series written by Kanzaki Ryuuko. It began serialisation in the Vol. 1 special issue of Manga Time Kirara Carat.

The series was released under 2 volumes from February 2005 to November 2005.

Synopsis
A boy and his sister are demon hunters. The only problem is that their powers only work when their minds are switched into each others bodies. So whenever a demon shows up, they automatically switch bodies, and then switch back.

(Source: Manga Updates)