Kekkon Suru tte Itta Yone? is a Manga/Manhwa/Manhua in english language, ROMANCE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

The main character, who promised to get married when he turned 18, looked at his family and realized "marriage is hell," but it was already too late. His childhood friend has grown up into a super duper nutjob woman he can't escape from?!