The Fainted Hero and The Assassination Princess 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

Toto is a novice hero who has finally put together the team that he'd always wanted. And he's ready to set out on a new adventure. But Toto's new party members' actual target is... his life?!