Feige, a high school student, has no special characteristics except that his left hand is thicker than an ordinary person, and his biggest wish is to have a wonderful youth encounter. Unexpectedly, on this day, Banhua would take the initiative to invite him to the rooftop for lunch! ! It didn’t take long for Feige to realize that things were not simple. On his left index finger, a grumpy girl lived in, claiming to be a warrior guarding the "love" of mankind, and wanted to destroy a creature called silkworm ghost around Feige. . Even more frightening was that he found that the other four fingers of his left hand were in a state of waiting...
