Oppenheimer!!!1!!1

Name seems to be a あの日見た花の名前を僕達はまだ知らない (AnoHana: We Still don't know the name of the flower we saw that day) reference.

Strange. The artist put the numbers 1945.8.4 in the picture's subtext (hinting at August 4th, 1945), but the Bombing of Hiroshima was on August 6th, two days later.