ROB's Lottery Wheel

Alexios Komnenos is a teen with a surname which raises eyebrows. Does he have connections to Ancient Byzantine Emperors? Well, it doesn't matter. That empire is long gone. But such a surname has left a mark on him. Then one day he gets an APP with ROB's name in it! What could go wrong? A waifu from a lottery wheel? Maybe the world change? Or some powers from an anime? Just one of a few things. Oh... And he gets a dungeon based on Dark Souls and Monster Hunter