Boku to Gimai no Kakushigoto – Kazoku ni Natta Kimi no Yuuwaku is a Manga/Manhwa/Manhua in english language, Adult series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Boku to Gimai no Kakushigoto – Kazoku ni Natta Kimi no Yuuwaku