Doubt! (AMANO Sakuya) Manga

Alternate Name: 
-
Year of Release: 
2012
Status: 
Ongoing
Author: 
AMANO Sakuya
Artist: 
AMANO Sakuya
Type: 
Japanese Manga (Read from right to left.)

Ichiru Kanzaki is given an offer he can't refuse: to clear his entire debt, he has to enroll in the high school where his father works to track down his father's illegitimate daughter, his own younger half-sister, whom he has never met. But which girl is she?