It's not that the adults didn't gain anything. The big BOSS's criminal motive for stealing time turned out to be to make up for the regret of not being able to accompany his father due to an accident when he was a child, hoping to turn back time and see his father again. Finally, he woke up: people can't turn back time, so they can't just stay in the memory of the past, but cherish the present and look forward bravely.
In addition, the husband of the female No. 1 Marisa used to focus on career, and he had to work hard for five years to become famous before spending time with his family, especially the children. He finally woke up: in five years, maybe the child will grow up and not need the company of adults, so let's accompany the child more now.
The above two points may also arouse a little insight from the adult audience.
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