After his comrade passed away, before Lin Yu jumped off the building, his comrade's father told him that he might not have a chance of survival, and that he would need to enter the parallel world through the watch given by his comrade and find his comrades on his own. (It is not easy for newcomers to create, and the writing style is immature. If you don't like the plot, please do not hurt the author. Thank you for your support)
