Akaku Saku Koeあかく咲く声; 붉게 피는 소리; Hana Dorobou (The Flower Thief); Kouhii Hirari; The Voice That Blooms Red

From Aerandria Scans: Karashima is a high school boy with a beautiful voice. So beautiful that he can make anyone do anything, just by saying the words. Because of his potentially dangerous ability, he distances himself away from people but soon finds himself in the middle of various criminal investigations that he can help solve, and a girl named Kokubu who seems in love with him. Volume 2 contains two one-shots, Hana Dorobou and Kouhii Hirari.