During their expedition to their old home, the family shares bittersweet memories about their lives left behind. Meanwhile, Suishi meets the family's landlord.

The landlord takes the family out for a day in the mountains. But the side effects of Ashisu and Aisuri's medicine begin to show themselves...

While Ashisu attempts to stop Aisuri's rampage, the sisters reflect upon the divergent paths their lives have taken as guinea pigs for their parents' experiments.