As for this game in particular, it's a rythm game? I've never really got into those, but I see people going hard as a motherfucker playing them, crazy stuff. I also approve of cute anime girls in sexy lingerie.
While may be arcade is considered dead in US or Europe, we still got many of them here in Asia.
Yep, it's a rhythm game. For me, Sega is good at making rhythm game, just like Konami.
Project Diva, Project Mirai, and Rhythm Kaito R are some of good sample in the handheld.
This is now the 4th arcade rhythm game by Sega:
Crackin DJ
Project Diva
MaiMai
(all of these games feature music by the legendary HIRO btw, of Outrun, After Burner fame)
and now this. Konami makes bank on these games, and it's really one of the few Arcade attractions that still does well.
Seems like Sega use the same Artstyle approach of Chain Chronicle, latching multiple Anime artists.
Yeah, legendary HIRO indeed, my fave from him of is
MAGICAL SOUND
SHOWER. 
In some malls near my place, we already got Crackin DJ and MaiMai.
Still no signs of Project Diva.
Most of people who play these games are girls.
Most guys prefer watching them playing these games than actually playing the games.
