Isekai Saikyou no Seikishi wa Joujakusugite Kyou mo Net Enjoushiteru: FF Gai Kara Shitsureishimasu

Many years ago a man in a turtleneck appeared from a different world, With his cheat abilities and high intellect he cooperated with the dwarves to make the device that changed the world, The "Smartphone". Years later, The world was taken by the magic of social media, And encouraged by his companion