Konoha Kaseki no Natsu

Animated graduation work by Touko Yatabe from Musashino Art University.

One day, Rintarou breaks the konoha fossil that his father cherished. Without being able to tell the truth, a feeling of guilt lingers. In the usual riverbank, where I was digging fossils, I met a strange boy, Toshi... A small fantasy of a summer woven by two boys and a stratum accumulates memories.

(Source: Video description, translated)