Sake holder Izmi town silvery white flat that doesn't disappear
elder brother 'Younger brother of ' 'Three warehouses (cherry blossoms)' one)the living in the outskirts in a certain apartment 'Shinto music and dancing ' hero and Nase brother (
It is a friend brother of famous (officially, ……) also in the vicinity.

Between such brothers, there is the girl 'Seed leaf' that father brought.
'Elder sister' for 'Younger sister' for one and three warehouses
Very usual brother and very usual elder sister × younger sister.   Three people who live as very usual family.
However, the Nase brother said to the seed leaf and held the desire of no be known while growing up …….
…… And, the life fails by one love letter that reaches the seed leaf.
It was being written, only a word 'It is favorite' in the letter without the address.

This is seen, and the seed leaf becomes the pupil of the girl who falls in love.
The Nase brother who saw it realizes it.   , saying that 'The way things are going, the seed leaf will be taken by the other party of the letter'.
And, two people determine it.
Such a thing is unrelated though the seed leaf that has been seen up to now as 'Younger sister × elder sister'. < …… , saying that BR 'I tell the desire to the younger sister (To the elder sister)'.

One transfer student comes to the school of which in such and they commute.
The name is 'Nase   tone. '
She is 'Younger sister. ' of one as for I  It is said, 'Younger sister' of 'Elder sister' of three warehouses and the seed leaf.
Another 'Younger sister × elder sister' turned out very much between Nase brothers.

'Love letter that reaches seed leaf''Elder sister × younger sister (sister sister) who shows up suddenly'
Desire of 'Nase brother's feelings' and seed leaves …….

Cafta of a largest-ever quarrel between brothers cut and was dropped here now.
Really, the sister sister (elder sister × younger sister) : to whose hand. ?

【 competition system 】

The competition that the brother unfolds is generated by the route of 'Seed leaf' and 'Tone'.
To acquire the heroine mutually, two of the hero characters that have been selected now develops a variety of defense wars.
  
The elder brother : younger brother for that to the obstruction of younger brother of his elder brother.
For instance, if the elder brother '1' dates the seed leaf, it visits it so that younger brother 'Three warehouses' may obstruct it.   Of course, the opposite can exist, too.
This changes depending on the user who plays.
Moreover, the result is reflected in the scenario.
The system "Choices chosen by the elder brother and choices chosen by younger brother influence mutually" is built in.