[spoiler] She said huh because when she flips the hourglass it reverses 5 mins or a bit more, so she reverses it to before drinking tea and finishing writing the letter. The downturn is every time she did it she got very tired so she had to sleep a lot
The ending seems like a rush game really? He's gone because his aunt smashed him and then come back and hug his girlfriend like nothing happened??? All those dramas between the dad and the girl got me so so confused.