Oops, I Said Yes!: Kunihiro Kasai summary:

What happens when The Boss with a Past marries The Bachelorette after zero days of dating?!Ayaka's been enjoying her life and her job; she has no intention of getting married any time soon.She's been working at her dream company, inspired by her incredible boss Kunihiro Kasai, and living life to the fullest.That is, until her country bumpkin parents and one of the upper brass badger her about her single status, and this undue pressure convinces her to get totally drunk.The next think she knows, there's a filled-out marriage certificate in front of her and someone whispering softly in her ear.Who's her sudden groom...? None other than Kunihiro! Can a chaotic marriage of convenience turn into something more?A comic version of the hit romance on Love 365: Find Your Story!