From ShoujoMagic: It happened in the blink of an eye. Rikka's world turned upside down when her school field trip bus flipped and plummeted into a lake. Everyone inside that bus drowned... except for Rikka, but she wasn't saved by anything as simple as luck. When she was released from the hospital, Rikka was then attacked repeatedly in a series of bizarre incidents all involving water... and a sadistic aquatic beauty whose name is -- Rikka!? What does our heroine have that the sadistic Rikka wants back? What was it that saved her from drowning, and who gave it to her and why...? Alt name(s): 水に棲む花 ; 水棲之花 ; ดอกไม้ในสายธาร ; A Flower in Water ; Flowers That Live in Water ; Mizu ni Sumu Hana - Romance of Darkness ; Phép thuật nước ; Romance of Darkness