When Rex is transported to a fantasy world like he's always dreamed of, all is not what it seems. Undergoing training, going on quests, 'chillling' with catgirls, Rex wants to fill his isekai bucket list as fast as he can. There's just one big problem... the Demon Lord might have already won??? Can Rex and his friends bring freedom to Omniscia, or will the Demon Lord and his minions keep up their winning streak?