At the start of summer vacation, the class must take part in a three-day drill. Rin remembers Shiro and is happy he has finally found friends. The class must find peg lanterns hidden in the forest and return with them. Rin, Shiemi, Ryuji, Renzo, and Konekomaru find one of the peg lanterns, a demon that consumes living things, and work together to transport it across a bridge. The plan goes awry when Rin accidentally destroys the bridge and awakens a chuchi, an insect demon.