Hitai ni Mikazukiひたいに三日月 ; 恋爱印记 ; Cinta Puteri Bulan Sabit ; Hitai ni Mikaduki

From ShoujoLove: Ten years ago, Yutaka followed Azusa but ended up falling from a tree. Because of that, she has a moon shaped scar on her forehead. Then the two separated, but when he came back, he was a shinobi!?