Save the World? but I Just Want to Form a Band!

[Japanese light novel + first person + no system + campus powers + multi-world travel + campus love] "Yan Yu, if we kiss, the world will be destroyed. Will you still kiss me?" After Yan Yu, a band guitarist who studied in Japan during junior high school, returned to China, she was told by her childhood sweetheart that she came from another world called "Utopia World" and had the ability to destroy the world by kissing Yan Yu. Immediately afterwards, Yan Yu met many people from other worlds such as the cyberpunk world and the magical world, and was eventually arranged to enter a special campus, becoming the key to saving the world. Moreover, the school threatened to confiscate the use of his music room to force him to help in the plan to save the world. "But, I just want to form a band!"