Onii-chan, Asa made Zutto Gyutte Shite! – Episode 4 (ES)

Big brother shares his home with sisters Sora, Akane, Kohaku, and the youngest, Sumi. Childhood asthma turned sleeping beside one sister into a comforting habit, now formalized by their researcher parents’ order: nightly hugs lasting 10+ seconds, with love, proper scent-sniffing, no separation, and daily practice—the “Onami Family Hug 5 Rules” framed proudly in the living room. Having completed turns with the older three, tonight’s sleeping partner is petite, animal-like Sumi, whom brother instinctively wants to protect. He finds her already asleep and gently strokes her soft cheek. In her slumber, Sumi instinctively licks his finger—a cute, unconscious habit that sends a warm flutter through him. When Sumi awakens, she shyly confesses she was dreaming about big brother and, while nestling into his arms for the mandatory hug, earnestly tells him she wants to be more helpful, to support him like her sisters do. Her small body presses close, her sweet scent and trusting warmth envelop him as the hug lingers far beyond the required time. Sumi’s pure devotion and innocent desire to give back deepen the emotional connection, blending protective love with subtle, tender arousal. As the experiment nears completion, these final nights with Sumi highlight the purest form of their family bond—affectionate, vulnerable, and quietly intimate—leaving brother cherishing every moment of their close, loving routine.