Read Manga MARRIAGETOXIN online in English. Also known as Marriage Toxin, マリッジトキシン, and Marijjitokishin. Hikaru Gero is the heir of a long-running family of poison assassins, raised in a shadowy world where romance has never been part of the job. Marriage is the last thing on his mind, until his clan’s demand for a successor threatens to drag his beloved sister into a future she never chose.

Desperate to protect her, Gero turns to Mei Kinosaki, a sharp-tongued marriage swindler with a talent for reading people and surviving dangerous situations. What begins as a strange partnership becomes a chaotic search for love, packed with deadly rival clans, awkward dates, brutal fights, and surprisingly sincere moments. Gero may know how to kill, but learning how to connect with someone might be his hardest mission yet.

This series may appeal to readers who enjoy action comedy, unconventional romance, and assassin underworld stories.