[Studio Katsudon (Manabe Jouji)] With your REAL SISTER? Or perhaps, with your STEP SISTER? [EHCOVE]

Two sisters—one his by blood, one his by remarriage—spend Christmas competing for their shared brother's bed, with the stepsister cheekily declaring 'he's my STEPbrother!' while the other confesses she's liked him for a loooooong time. What starts as bickering over who deserves him melts into a sweat-drenched, stocking-clad threesome where nostalgic bath memories and breathless pleas to 'become one' leave no sibling boundary intact. With both girls refusing to yield and bodies tangling in heaving, slippery heat, the only question left is which kind of sisterly love claims him first.