One day, protagonist Mayama notices there are some strange threads tangled onto his hand. At times, the threads bind his palms so sharply that it injures him, and they never seem to disappear. Mayama soon notices that he is surrounded by his homeroom teacher overcovered in threads, a faceless father, and his classmates entangled in threads. There lies a trauma involving threads he faced as a child... To uncover the threads’ mystery, Mayama gets in touch with peoples’ hearts. A story of adolescence begins about the friendships and struggles woven by threads!