In the spring when the protagonist is 19 years old she passes her entrance exams and manages to start going to her favored university.

Both her parents have to go overseas because of work, so she ends up living with just her older brother Kazuki.
She spends her days happily being watched over by her older brother who thinks highly of his little sister.

Than one day she receives terrible news, her parents have suddenly died in a tragic accident.
Losing her precious parents the protagonist sinks into sadness.
But she is supported by her older brother and her childhood friend Kouhei and becomes a little happier.

But suddenly the strain of their parents deaths gets to her older brother and he suddenly collapses.
The protagonist is at a loss,
"Please... Save my brother..."
Her hearts prayer goes answered and her brother regains consciousness for a time.

However, their house full of the memories of their parents is about to get seized by the Yakuza, and the protagonist gets involved in other various incidents.
But she tries to live on strongly with various people supporting her.
In the season of whirling cherry petals a sorrowful and heartrending but also beloved story is starting.

[Translated from the official site]