RA*I, by Sanami Matoh. First published in 1995 and first published in North America in 2006.
PLOT:
Al Foster was just another no-name private detective until the day Rai Spencer came through his door. Rai is a 13-year-old genius from a wealthy family with ESP, and he and his older sister Rei are concerned that their elder brother is trying to kill them. Al helps them solve their case, but what will happen when they decide to stick around and start solving crimes with him?
