This is a story that only happens in summer
Boy, girl who gradually becomes transparent, flowers, grass, insects and fish
Weird things happen one after another...
The truth gradually becomes clear...
"I will be back soon, so fast that you can't finish my name."
"Wu Yi."
"... Maybe not that fast."
"What if I lied about everything?"
"Then at least I'm sure this is true."
A pair of tightly held hands, like a vow from a previous life