Let's go KAIKIGUMI

S01E06 Mystery 6

A grotesque, sentient growth attaches itself to a teenage girl's leg during her junior year, becoming an unshakeable and invasive companion. The lump, with a disturbing will of its own, follows her everywhere—from classrooms to her bedroom—manipulating her actions and isolating her from friends and family. As its grip tightens, she must uncover the source of this parasitic entity before it consumes her completely, both physically and mentally.