Ultra: Let Carmilla Pretend to Be Your Girlfriend at the Beginning

Yang Chen was reborn in a brand new world. He discovered that this world was connected to Ultraman's world. Many cosmic people and monsters passed through wormholes and came to the real world. By chance, under the instructions of the system, Yang Chen got acquainted with Carmilla who had traveled through time. From then on, she became friends with him and began to work with him to complete tasks against cosmic humans and monsters. They even pretended to be his girlfriend and accompanied him to his class reunion...