Following the death of her pet dog that had accompanied her throughout high school, college, and even as she entered employment, Satou Yui was drowning away her sorrows with alcohol at a bar when the man beside her made a grand move to earn himself her malice. "No matter the type of medicine you take, you'll be able to meet your dog quickly as long as you make sure to overdose. If you're averse to the idea, then take some medicine to cure that dull-looking head of yours and compose yourself until it's your turn to die."
Wondering why she had to be told something like that by some stranger, she trips him and causes him to fall. "Sorry, it was on purpose~" While later thinking to herself that she might have overdone it, the man comes looking for her the next day and it so happens that he's the CEO of the company she's employed under?
『社長!? 昨日のあいつが!!??』――高校・大学・社会人とずっとそばにいてくれた愛犬を亡くし、バーでヤケ酒を浴びながら泣きわめき叫んでいると、隣の男性から「その悪そうな頭を治す薬でも飲んで死ぬまで大人しくしてください」と盛大なイヤミの応酬!!なんで知らない奴からここまで言われないといけないの!?仕返しに奴の足をひっかけ転ばせ「あ ごめーん わざとでーす」と言ってやった!!!（だがやりすぎた…）そうしたら翌日、その男が社長として現れ、しかも私を探しているだ…と…！！？？