Is a game that the rhino with a horn to the hippopotamus . -Story- AD XXXX year, the ground has been conquered in the hippopotamus. Rhino loving boy got a very useful rhino horn that does not go away even with much. Become rhino it means the horn to hippopotamus on the ground. If a hippopotamus on the ground to the rhino, after ought become somehow. Battle of the rhino loving boy began. --------- And aiming at the head of a hippopotamus come rushing from the left and right Attempt to install the " rhino horn " ! Hippopotamus changes to rhino ! ! Get experience value by changing the hippopotamus in the rhino ! Attempt to raise the upper limit of HP at a level up ! After that just change the rhinoceros the silently hippopotamus ! Barren battle now begins .