Summer: Life in the Countryside

This is what happens on hot summer days. Our protagonist has to take care of his cousin Hazuki Natsuhara after his aunt asked him to. They hadn't seen each other for years but Hazuki was glad to see him again although she seemed a bit embarrassed... She was so excited to see him again for the first time in a long time that she started touching herself and he accidentally saw her... Is this an opportunity to change? things?