After drunkenly kissing her ex-boyfriend Takashi Iwanaga, Koki Miyata fell into a deep state of regret.Miyata swears that I will never fall in love again!% and tried to negotiate directly with the editor-in-chief to replace him in Chong's work with another editor, but ultimately failed.

Then, when Miyata was called to work in Takashi's laboratory, he was bombarded with unexpected words from his assistant Shiraishi, who had a crush on Takashi.

In order to live a fulfilling life without Takashi's influence...Miyata decided to propose to his girlfriend Fukuda Ako, who has been dating for three years.Then she made a reservation at a restaurant and bet on the engagement ring.On the other hand, Takashi is forced by Shiraishi to fall in love again...?!