Storyline:At first glance, they appear to be unequal and, above all, unlikely couples, but true friendship knows no bounds: Kyuta is a lonely and parentless boy who roams the Tokyo district of Shibuya and simply lives into the day. But one day he enters an imaginative parallel world, which is populated by supernatural figures. This realm should not actually overlap with the real one, which is why Kyuta shakes the hitherto prevailing, delicate balance. Lost and looking for a way back, he meets the equally lonely beast Kumatetsu. But despite his wild appearance, the boy is friendly and takes him under his wing. Kumatetsu teaches him different things and together they set off to experience exciting adventures - if need be, swinging Katana as well.