Promise (S01E04)

While Tsukasa anxiously awaits Nasa's return, a young girl named Chitose approaches her, calling her "Nee-sama." Chitose requests that Tsukasa come home with her, but when Tsukasa doesn't respond, Chitose turns her attention to Nasa. He attempts to lift her spirits, but upon discovering that Nasa is Tsukasa's husband, her demeanor shifts dramatically. Before Nasa can clarify the situation, Chitose pushes him into a black car, which promptly speeds off.