The development later in the movie was pretty much as Kagura Hikaru had expected.
The only unforeseen part was that, in the end, the female protagonist forgot the male protagonist, losing all the memories they had shared.
This means their relationship was completely erased, with almost no chance of recalling it.
But the male protagonist wasn't discouraged, he just calmly smiled, as if he was meeting her for the first time, and struck up a conversation again.
If this were at the beginning of the film, before experiencing all this, the male protagonist surely wouldn't have been so composed, he matured by the end.
Kagura Hikaru was quite envious of that open-minded attitude towards life, because he couldn't manage to do the same.
The movie ended, and the credits and cast list started to play.