Yuuna-chan is a slutty girl who seduces her sister's husband. "Do you masturbate?" "Who's cuter, you or me?" She teases her sister's husband and the pranks gradually escalate. "I'll let you lick just my feet." "What's with this dick? It's stupid." She's been here for a week. Her sister's husband has started calling her "Yuuna-sama." (I'm tired of this dick, so I'm going to tell my sister...) There are no performers under the age of 18 in this work.