Warugaki ① (悪ガキッ①; Bad Brats 1) is the first album released by S/mileage. The album was released in both limited and regular editions, the limited coming with a bonus DVD. The limited edition and the first press of the regular edition came with a serial number card which, when entered in a lottery, could win tickets to one of the album's release events. The album reached #18 on the Oricon charts and charted for five weeks, selling 11,848 copies. This is the first and last album to feature Maeda Yuuka, Ogawa Saki, and the initial 4 member line-up.