"I was the one hiding my feelings. I'm sorry." Sakurai Hiyori works at a candy company and wants to create a treat as delicious as her favorite chocolate, "Park." But it turns out that this chocolate was invented by her stern demon boss, Sugou! Enduring daily humiliation and insults, Hiyori secretly dreams of Sugou. However, rumor has it that Sugou is dating a self-confident but kind, beautiful girl... Hiyori's secret love turns out to be no sweeter than candy! An office comedy about a sadistic boss and an optimistic subordinate!