she is only living with her mom in this loneliness apocalypse of mysterious missing people, and include her dad a month ago, now the rest humans can do is to survive and build a new family, era, or start from zero

not a long time ago, he finds kei, his friend from university and now the only human that alive is three including him, his mom (Hanami) and kei.

now is 2 years they already survive and sometimes his mom always sexually stressed because cant hug or be with his dad that apocalypse