Reborn as a Vending Machine, I Now Wander the Dungeon with my Digimon sister

The future of this fantasy world now lies in the hands of...a vending machine! Boxxo and his digital creature sister was once humans, until they'd died in an accident and was reincarnated as a sentient piece of machinery when his sister is little purple fox. While the brother hear and see, there's no way for him to move by himself or speak more than his programmed phrases. How can he make the most of this strange new life? When the sister needs a partner to count on when she need it.