Sahori is a former Jouin High School student and ex-lacrosse club member. After a past accident and subsequent bullying, she became withdrawn and resentful, carrying her burden silently. She avoids her friend Tao, fearing involvement. Her dark thoughts attract Lahmu, a mythological being seeking a partner. Lahmu preys on Sahori's vulnerabilities, tempting her to embrace her hatred. She eventually joins Lahmu, seeking revenge on her bullies.