Summer Sacrifice

It all begins at the height of summer
An ordinary rural town.
The protagonist takes a temporary live-in job as a janitor during the summer vacation.
There, he meets his niece, Takanashi Otsuha, and her older childhood friend, Akatsuki Rino.
By chance, the protagonist begins to develop a special relationship with both Otsuha and Rino.
"Where will the events that take place in a closed room in midsummer lead...?"