In Ro-Kyu-Bu! you play as Subaru Hasegawa who coaches an elementary school’s basketball team. Tomoka Minato, Maho Misawa, Saki Nagatsuka, and Hinata Hakamada are confirmed to be in the PSP game.
How you play the game… is a bit of a mystery. Kadokawa Games has not released details about that and the genre, loli sports coaching adventure, doesn’t explain anything.
Ro-Kyu-Bu! is slated for a summer release on PSP in Japan.