My Girlfriend Wants Me to Share My Harem?

I am Steve. And there is something strange about the setting of the world I have reincarnated. Wait is that my girlfriend ?! And what the hell is she doing! I have to do something about this. My heart and brain in unison: "STOP HER!!!!" My lower body: "Can I join in?" The maid on the book cover: "Don't look at me, I have no idea how things turned out like this" Me: "Is all of this happening because I reincarnated without being hit by a truck?" If you want to know how I got in this mess, you got to tag along with me in this comic story. Update frequency: A chapter a day shall keep your boredom away.