Gabriel's arch-nemesis, Sister Zeruel, descends to Earth to check on her sister? Gabriel is flustered by this unexpected turn of events, but she devises a secret plan and prepares to confront her strict sister with the "hospitality operation"! Can the fallen angel Gabriel protect her way of life? This volume includes the long episode "Zeruel Arc" and is the eighth installment of the hugely popular fallen angel comedy that was adapted into a TV anime in 2017!