You from the Parallel Time and Space

Plot Synopsis

The female protagonist leads a plain life, working from dawn to dusk. She accidentally travels to a parallel time and space where she herself exists, and all kinds of funny things happen on campus. Through constantly traveling back and forth between parallel time and space, she heals herself, saves herself, and finally finds her own happiness. The ideal is full, but the life is harsh. If one could come back to life fully recharged, could one become excellent?