Zutto Mayonaka de Iinoni. (abbreviated as ずとまよ ZUTOMAYO) is a Japanese rock group that debuted in 2018. Secretive by nature, the group never released a full member list, crediting different people for music, arrangements, and music video production each time. The only reoccurring member is the vocalist: an unidentified woman named "ACA-Ne" (ACAね), pronounced "Akane".
