Tập 7: Retsuko đối đầu với Giám đốc Ton trong một cuộc đấu karaoke leo thang thành trận chiến âm nhạc đầy phẫn nộ.

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The next morning, Director Ton acts uncharacteristically nice, scaring all the co-workers in the Accounting Department. Ton wants to find out who reported him to the president. That night at an office party, Retsuko hopes she can clear the air with Director Ton, only for Ton to determine that it was Retsuko who had him reported. During a karaoke duel, Ton raps about how useless Retsuko is. Retsuko, almost in despair, finally unleashes her rage form and responds with death metal, knocking everyone out. (Source: Wikipedia)