We still don’t know the name of the flower we saw that day Theatrical version

One midsummer day in childhood, the girl Mianma (voiced by Kayano Ai) died in an accident. This sudden death deeply hurt her five childhood playmates - Renta, An Ming, Yukiji, Tsurumiko and Bobo. The secret base "Super Peace Busters" composed of six people was disbanded, and the five living people grew apart and grew up separately with irreparable trauma. Ten years later, Mianma actually came back in a form that only Renta could see, with a wish that he wanted to realize. This theatrical version begins with the story that Mian Ma has "become a Buddha" with the help of five friends. One year after Mian Ma fulfilled his wish and disappeared, Renta and the five of them reunited and each wrote a letter to Mian Ma, recalling the miracle that happened to the six "Super Peace Busters" last summer.