あの日見た花の名前を僕達はまだ知らない。 2

[DeepL Translation - needs review] Introduction to Volume 1: The time that stopped here on that day begins to move.　In elementary school, a boy named Ninta Shukumi formed a group called the "Chouheiwa Busters" with his friends and was called "Jintan.　After the death of Menma, the group fell apart, but Menma suddenly appears in front of him...?

(Translator: DeepL)