On a night when there is a major power outage, I'm alone with my admired sister-in-law...

One day, when I recorded the midsummer day, I was planning to enjoy dinner at home with my wife's family. While my wife goes to pick up my stepmother, I am alone with my sister-in-law Reiko... Reiko was beautiful and kind...I was desperate to maintain my rationality in that situation... While waiting for his wives, Reiko and her two attempt to open a can of beer when a massive power outage occurs. In a sudden accident, they end up spending the night alone, but Reiko is scared of the darkness and is unable to contain her excitement as she is close to them...