Before I knew it, an app called “Absolute Mutual Love App” had appeared on my smartphone. With it, you can add new erogenous zones to a girl, heighten her sensitivity, and even manipulate her romantic feelings—a godlike app that lets you do whatever you want! Realizing its power, I try to use it right away on Usokawa-chan, the girl I have a crush on, but for some reason other girls keep interfering one after another… Building a harem with a magical app!? A free-for-all, anything-goes “smartphone life” is about to begin!?