The heroine has a system,
A variety of Puella Magi Madoka Magica, but it should not involve the main plot of Madoka Magica
Gin's sister, because of the experiment, her appearance stayed at 16 years old
His character is a bit crazy and his motivation is to make every character angry to death.
Will rescue some characters, the protagonist is Gray Fang
Purpose: Save the winery (?)