Nagasarete Kinjitou

A popular manga artist's life is turned upside down by a young and beautiful female editor! A thriller depicting a forbidden relationship begins! Kyosuke Takasago is the writer behind the popular mangaka duo "Nankyo," who along with his wife, the artist Minami Takasago, are currently serializing a hit manga Typhoon Hitomi. He has a secret that he can never tell anyone in the world, let alone his wife. But of all people, his new editor knows his secret, and Kyosuke's brilliant life quickly crumbles with a bang...!

(Source: Magapoke, translated)