Apeiron of RecollectionTsuioku no Apeiron; 追憶のアペイロン; 追忆无垠; Apeiron of Recollection

In a world where an epidemic causing amnesia is spreading, a group of two boys and two girls are discharged from the hospital. Shortly afterwards, a mysterious accident involves the four young people who, disoriented, begin to doubt their memories while trying to understand the truth.