Mizuki was fidgeting and waiting.
Now that her beloved brother is late to return, she cools her room with an air conditioner and puts on a swimsuit and waits.
She used to communicate with her on her mobile phone every day, but she was lonely and tried to cry and scream.
But until yesterday. Because …
Mizuki jumps out of the room as if to be played by the sound of the front door opening.
“Shiro Nii ♪”
A very hot summer begins.