Why do you say that?
Since the film is under the banner of "Cure", Lao Xu and Fang Xin must not break their promises.
If every character symbolizes a kind of person.
The pink circle symbolizes "a person who has become timid because of the ordinary"
Miki Sayaka symbolizes "a man who gives up on himself because he has lost his ideal"
Senior sister symbolizes "the person who has become helpless because of the accident"
Red hair symbolizes "a person who becomes selfish because of mistakes"
Black and straight symbolizes "people who are addicted to the past because of regret"
Therefore, at present, the senior has been cured, because the senior has always been supported by the pink circle (although convenient).
Red hair also began to heal, because she began to pay attention to others (although it was still very relaxed) ...
Then, Lao Xu should guide others and realize the promise of "cure".
The result is:
The pink circle became brave to move forward.
Miki Sayaka is no longer desperate.
Red hair is willing to give up for others.
Hei Changzhi no longer indulges in the past.
In this way, Lao Xu realized his promise of "healing"