Waifu Novel!! (Male reader x Massive harem)!

(Y/N) (L/N) is your ordinary 19 year old man. He works out, has a normal well paid job, lives in a house, has a pet dog named Ghost, and loves books, anime, manga, video games, and all various media!! One day, he finds a weird novel on the ground, titled "Waifu Novel!" He picks it up and decides to read it!! However...