Takurazuka Revue Company, Cosmos Troupe, former top star Suzuho Makaze's smartphone case, supervised by the top star. Please refer to the ruler on the left side of the third photo for the size. I used it by attaching a transparent case that fit the shape of my smartphone, but the transparent case shown in the third photo can be removed, so you can purchase a case that fits your smartphone at a 100-yen shop or similar and attach it, allowing it to be used with any smartphone.