Dark Sea Era is a Manga/Manhwa/Manhua in english language, Manhua 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

Doomsday broke out, zombies besieged the city, an ordinary youth carrying a frigtening secret on his shoulders, has been awakened by an ordinary boy and gains control of the goddess and her fighting abilities. Mysterious forces invading in all directions, and a fight for survival. In order to uncover the unfortunate events and mysteries around him, the youth and the goddess embark on a journey to uncover the real truth.