The protagonist Saionji Kazuki (Matsumoto Wakana) is a 38-year-old single woman who works at the app production company ress Q.The app I made has reached 5 million downloads, and my work is going smoothly!Recently, she bought a big house and started living with her pet dog. She realized her dream of %zero housework and lived a very fulfilling life both in public and private life.

However, the peaceful life changed when Toshi Nao Kusumi (Matsumura Hokuto), an engineer who returned from the United States, switched jobs to the company.Nanjian had a cold attitude, was expressionless, and had no coordination. He could only talk sense. He criticized the app made by Saionji. Saionji felt that he couldn't get along with him at all, and even wanted to get angry with him several times.

Under such circumstances, Saionji was instructed by the president Amano Ryuuji (Fujii Takashi) to live in harmony with Kusumi, so he had no choice but to go to dinner with Kusumi.

But there, Saionji learned that Kusuomi had an unexpected secret.That is, Kusumi is a single father raising his 4-year-old daughter Ruka (Kurata Eima) by himself?