My secret summer vacation

During the summer vacation, the main character was taken to a rural island where his aunt lived. While enjoying the summer vacation, get along with your sister, aunt, and children on the island. Animated summer vacation RPG. There is a nostalgic atmosphere somewhere like a certain summer vacation game On an island where time passes while day and night change, Fishing, swimming, boating Gacha-gacha, picking up bottles and looking for cats Then collect insects and battle at a secret base. You can spend a boyish summer vacation. But this game is "secret summer vacation". An event of Naisho that c...