It's Boku no Natsuyasumi but with a Crayon Shin-chan skin and a bit more "direction" and less "aimlessness"
Though you can play very aimlessly, the game does have "objectives" it wants you to achieve, and a lot of side stuff you can just go and do if you feel like it

It's a very very good game for an audience that likes things like Harvest Moon and Stardew Valley.