Save Toshi is an iOS port that comes to us from developer Nitako. In the game, you are tasked with getting pop star Toshi onto a dancefloor, as her dancing kills demons. The storyline is very "Japan," as are the voice effects that accompany each of Toshi's movements. The voice acting is actually quite annoying, but the game (mercifully) comes with an option to turn it off.
Unless the anime aesthetic appeals to you, there's a good chance that Save Toshi won't be your cup of tea.