The unexpected encounter with the smart yet deadly cute little girl in her one day job had leads her to reconnecting to her past, Kim Kai. 

To Nayeon, if you ever asks what the craziest thing would a best friend do, she could say was marrying her crazy and silly friend who live his life as if no tomorrow and whom she thought might be gay, Byun Baekhyun. To Baekhyun, marriage is a phase. He can live forever but marriage is pure. He would never make it a joke. Screw that. He would not even consider it but that might be different especially when he going to marry his best friend, Kim Nayeon.