Gregory Horror Show: Another World is a Manga/Manhwa/Manhua in english language, SUGGESTIVE 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

It follows Tooru Takenotsuka, a 22 year old freeter comes to the city to follow his dreams. Thanks to his status, he is unable to find an apartment to live in until a seedy real estate agent introduces him to Gregory House.