The Kikumon family is always filled with moans. The three sisters living in this household value sex more than daily meals, regularly inviting men over to indulge in pleasure and ecstasy every day. However, their defining trait is the intense arousal they feel from having their anuses licked. This sensation colors their everyday lives, performed almost like a sacred ritual. The interplay of each sister's personality and their complex relationships deepens the bonds and desires that emerge, enriching the story.