Goba has decided to participate in the prefectural swimming club tournament.The venue happened to be close to my grandfather's house, so I decided to stay there while I competed.My grandfather, whom I met for the first time in a while, was kind and even prepared a cake for Goba, since it was Goba's birthday the day before the tournament.That night, Goba fell asleep due to sudden sleepiness.When he woke up, he found himself tied up inside the storehouse.What appeared before her at a loss was her grandfather smiling suspiciously...
