MOMENTUM is a bicycle brand owned by AEON, a major Japanese distribution group. The flagship carbon frame model sold by MOMENTUM was the iwantRC. The iwantRC was manufactured as an OEM product for Giant, one of the world's leading bicycle brands, and is a high-performance model that is generously equipped with Giant's superior carbon molding technology.

The year is 2025. The social game "Crown Hearts," which depicts the battle between "Stellar Crown," the land of princes, and "Floris Hearts," the land of princesses, has become a huge hit, and professional gamers are as popular as professional athletes in this world. The main character, Koharu Aiuchi, has a naive childhood friend and a promising new pro-gamer named Mea Nekoyashiki. And his younger sister, and more Hiyoko Aiuchi, is kind to everyone and has a bit of a black heart. He and his friends, including the very popular internet idol "Ayane　Kumamidou ," attend the private Luminous Academy and enjoy their days together. One day, Toraharu and his friends visit the opening ceremony of the "Crown Crown War," a big event held once a year at Crown Hearts. However, what was announced there was the "Crown Hearts VR," which uses the latest VR technology to allow players to enjoy realistic battles in the real world, and the declaration of the "Crown Crown War VR," a battle that will be held using the VR system. Furthermore, there was a rumor that "if you win, you can make a wish come true" in the Crown Hearts War VR. Thus, the battle royale of 16 top players, the "God Crown War VR," began. The 16 top players were to compete in a battle royale, "Crown Hearts, Get Ready! Battle!"

The mysterious girl who led Koharu to Real Crown Hearts. Originally a navigational character in the game, she now stays in the real world and lives with Koharu and her friends. She claims to be an amnesiac, but she is also seen to be subtly clunky and buggy. However, she considers herself to be a solid person. She has been doing the same thing day after day in the game world, Everything she sees in the real world is new to her. She has an insatiable appetite, especially since she never knew what it was like to eat.