Fei Ge, a high school student, had nothing but his better-than-average left hand going for him. His greatest wish was for his very own romantic encounter, but it still came as a surprise when the most popular girl in class asked him to have lunch with her at the rooftop! Fei Ge hadn't rejoiced for long when he realized things weren't as simple as they seemed. A hot-tempered girl, who identified herself as a warrior that protects human love, took residence on his left index finger and sought to kill a monster that Fei Ge learned was called Caterghost. To make matters worse, Fei Ge notices that the other fingers on his left hand were in a similar state of standby...