Tập 4: Ruki kiệt sức thức trắng hai đêm và gây xôn xao ở trường

Because of a deadline coming up, Ruki ends up staying up two nights in a row. She ends up going to school in this condition and can't help but feel sleepy, despite how earnestly she usually tries at school. However, this dazed state she's in makes her look sexier than usual, causing a stir in class... (Source: Crunchyroll)

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