Sister Honoka and younger brother Jo, who lost their parents in the airstrike, live at an evacuation site. One day, the younger brother was drafted, but he escaped and ran to his older sister. Taking advantage of Honoka's weakness to ask her to hide her younger brother, the uncle raped her and turned her into his own woman. The soldier heard rumors that he saw his sister being raped and forced his younger brother and sister to commit incest.