There is a 90% chance that life will be unsatisfactory, not to mention that if you get married at a young age, as long as you don't die young, there is a 80% chance that life will be unsatisfactory after marriage... Right? What would I prepare if I could travel through time like in the novel? In the thirty years that are neither long nor short, we should take care of those unsatisfactory things and avoid pitfalls. How should we respond sharply to those who had no time to reply because their brains couldn't turn around? Will I meet you again that year? Will we be together again if I meet you?
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.