"Even rational people have their limits." I want him to wrap me in those big, strong arms... Do I really deserve this though? Kotoe and Itsuki are both 36 and met at a matchmaking party. With both thinking seriously about marriage, they agree on some rules for marriage in the form of a "prenup". But there's even a section about "Nightly Affairs"...?! To ensure there will be no problems, they decide to move in together and do a trial run. A love comedy following two adults who want to look before they leap (into marriage)!