直樹の父が意気消沈して帰宅、電話で直樹を呼び出した。聞けば、会社の金を秘書が持ち逃げし、同時に新製品の企画書もなくなってしまったのだという。そこで直樹の父は、｢社長秘書代理｣として相談役を引き受けてほしいと彼に頼んだのだ。一緒にバイトをすることになった琴子は、会社でもあいかわらずのドジぶりを発揮するが......? Naoki's father returns home depressed, phoning Naoki to come over. He informs Naoki that his secretary had ran off with his company's money, as well as the project plans for the new product being developed having disappeared. Then Naoki's father requests his son to become a "Substitute Secretary" and be his advisor. Kotoko becomes a part timer with with him, but is as usual, clumsy even at this company...?