A series of events leads single, 25-year-old Mikuri Moriyama and 36-year-old Hiramasa Tsuzaki to marry as a cover.

Kanji Senkawa receives requests which the police or private investigators can't handle. He solves the cases by threatening people. Kanji Senkawa meets wealthy university student Mio Kanesaka. She has a good heart and and can't ignore those in difficult situations. Kanji and Mio get involved in various cases including voice phishing and kidnappings.

Asuka Takanashi is a twenty-something woman who works for a megabank and holds various professional qualifications in finance. Despite her successful career, she is extremely eager to get married and become a stay-at-home housewife. One day, she suddenly gets damped by her boyfriend of five years. Desperate to find her next potential husband, she immediately starts searching to find the "love of her life." Then she meets Ryu Nanami, a very popular TV newscaster. He appears to be the most ideal man for Asuka, except that Ryu is 100% against the idea of marriage and determined to never get married. However, despite their different views on marriage, they eventually fall in love and start their relationship. It seemed as though everything was going so well, but this was the beginning of their “Battle of Values.” Where is their romantic relationship headed? Will Asuka be able to announce her marriage and make her dream come true?

Aino Hingo used to work as an associate professor of ethnology. He now works as the director of a matchmaking agency. His assistant is Sister Elizabeth. The high entrance fee at the matchmaking agency is two million yen, but the matchmaking agency has a 100% success rating for their clients getting married. They match customers based on the client's conditions. The secret behind their 100% marriage rate is Shingo Aino's counseling, relying on his knowledge in ethology.