Inaka de Shiyou! Tottori Hen -Boku to Imouto-tachi no Natsuyasumi-

"Onii-chan is coming back---"

The big brother that left home years ago comes back into his hometown for the summer vacation.

At the time they had to part with their big brother, his young sisters cried, since they couldn't meet him anymore.
After that they grew up themself.
They aren't just always crying children anymore.

"We'll surely meet again"

Those two Imoutos always looked forward to meet him again.

One of them has faint feelings in her heart...

One of them is interested in sex...