Description：Famima! summary: “Ah~, if my life was a game, I want to restart it from this morning!”What Kazuki received from his parents via the post was a ‘little sister’!? According to his parents there were circ.u.mstances behind Sabrina…“A mafia’s hidden child?”“Si.”“And an amateur a.s.sa.s.sin?”“Si.”Sabrina hugged tightly onto Kazuki.“And… I’m your little sister. I wanted to meet you, Onii-chan.”What would happen to a middle school student when he suddenly gets a cute little sister? And that little sister happened to be a blond foreigner with blue eyes? And that little sister happened to be an amateur a.s.sa.s.sin?What would happen to our protagonist- Kazuki Outaki’s everyday life!