替霊～カエ・ダマ～

During World War II... Isamu, a young man, lives in a basement with his four younger siblings under the strict orders of their father. The children are starving, surviving only on the meager supplies their father brings. One day, after the father forgets to lock the door, Isamu leaves the basement in search of water. However, he discovers a vast underground space and stumbles upon a small room filled with countless rows of medicine bottles—!?