Mio, a girl who wants to have a pet but couldn because of her living situation, decides to play the VR game magic world online at the recommendation of her brother. Mio jumps into the game world after hearing that she can reproduce all five senses of the player in the game and interact with monsters, and immediately tames one monster. However, it was a monster mini slime that was said to be the weakest during the beta test! Ill make this girl strong. Ill make her strong enough that no one will make fun of her! Because Im a Tamer! The story of a girl who starts an adventure at her own pace with many monsters and players in her first VRMMO.