A young girl goes to a festival that is located on the threshold between the human world and the spirit world.

Having forgotten exciting feelings of the early days of the relationship, the man drifts along petting his guinea pig. One day he meets a beauty of flower who appreciates the pet.
 
Tomoki Misato's 2016 Graduation Work at Musashino Art University.

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)