Noa Kiritani, secretary to the president of a major corporation, finds every day working under her gentle and kind boss fulfilling. One day, however, the company president collapses from a sudden but mild stroke. As a result, he steps down as president and assumes the role of company chairman. In his stead, Wataru, his son, takes on the position as company president. Much to Noa's dismay, Wataru is the complete opposite of his father -- he is hardheaded, pompous... a complete monster! On top of that, Wataru pummels Noa with unreasonable request after unreasonable request... can Noa, now secretary to both the company president and the chairman, catch a break?! 大企業の社長秘書として働く桐谷望愛（のあ）。穏やかで優しい社長のもとで充実した日々を送っていたが、ある日社長が軽度の脳梗塞で倒れ、会長の座に就くことに。代わりに社長となったのは、その息子・渉（わたる）。しかし渉は父親と真逆の、とんでもなく冷徹で俺様なモンスターだった…。そして、社長交代にともない会長秘書となるはずだった望愛に、渉は無理難題をふっかけてきて――…!?