​Introducing “Immunity Boost Experiment”; a heartwarming hentai video episode that explores the unique bond between siblings. Follow the story of Kohaku, a dedicated sister entrusted with the task of helping her sickly brother improve his immunity. As they engage in extended daily hugs, something unexpected begins to transpire. Witness the transformative power of affection as their relationship takes on a whole new dimension. With each passing day, the dynamics shift, leaving an indelible mark on their lives. Experience the emotional rollercoaster of love, sacrifice, and forbidden desires in this captivating anime tale. Don’t miss out on “Immunity Boost Experiment”, a fascinating journey that challenges societal norms and explores the boundaries of familial love.​