Falling For Danger is a Manga/Manhwa/Manhua in english language, Action 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

Hayden Windsor was a renowned hitman until he is betrayed and loses the love of his life. With nothing left to live for, he begins a war of revenge on the very organization he used to work for. That is, until he meets Marine, a girl who brings color back into his black and white existence.