Counterattacks are risky, so be cautious when counterattacking. If we can't catch up with the chaos of time and space, can we only suffer? This society belongs to diplomas, and each academic qualification is like a sharp and transparent dividing line, demarcating the lives of the third, sixth and ninth grades. When he awakens at the bottom of these lines, how will he face the past and the future... And how will love and friendship struggle in reality.