The Fruit of Grisaia (2014) : 1x11

The survivors of the crash continue to make do as Kazuki continues to care for the wounded. As the days pass, they bury their dead and continue to gather what little food they can find. Their teacher, having scouted around, takes half of the food and leaves, promising that he will return with help. Despair sets in when he does not return after a couple of days. Malnourished, some of the girls start acting strangely. Finally, the pet dog of one of the girls perishes and is butchered to provide the survivors with sustenance.