The protagonist has a group chat where all the characters are protagonists from parallel worlds. Different parallel worlds awaken different systems. Currently, there are: One Piece world: a disguise system; the first disguise is Columbia, and it's estimated that she will establish the Winter Kingdom in the One Piece world later. Jujutsu Kaisen world: a potential activation system, allowing early access to the future abilities of the Tiger Emperor (weakened). Because the protagonist is a girl, after transmigrating into the Tiger Emperor, the Tiger Emperor and Sukuna in this world also become girls. Nurarihyon no Mago world: transmigrated into Nura Rikuo; hey, not only is she a girl, but she also has a 1v1 with the Yuki-onna! She awakens the ability to upgrade the Shadow Lord independently; those who know, know the coolness of "standing up." Is It Wrong to Try to Pick Up Girls in a Dungeon? World: the female protagonist awakens the strongest familia system, draws Sandone and exchanges it with the One Piece world, taking Tiamat's disguise for herself. So, in this world, Xia He is going to become Tiamat! The girl also found her puppet; how wonderful! Coca-Cola!