Kimitachi wa Dou Ikiru ka

After Mahito`s mother is killed during the firebombings of Tokyo, he and his father move out of the city to live with his maternal aunt—who is already pregnant with his new half-sibling. Struggling to accept both his mother`s death and new familial situation, Mahito is harassed by a talking blue heron who promises that, if they go to a nearby abandoned mansion, he can meet his mother once more.