Chii-chan

Yua Hayakawa once had a close friendship with Chi, a girl with a mysterious background who enjoys collecting dead insects. They haven't spoken in years, and Chi rarely attends school. When she unexpectedly appears in class wearing damaged gym clothes and carrying dead bugs, it sparks an idea in Koudai, a popular classmate, who wants to help her. He asks Yua to assist, but appearances can be misleading, and the troubling aspects of Chi's nature might be more severe than Yua realizes.