Mei

The daughter of the uncle's older brother and his wife. Her grades weren't great before summer break, but after receiving her uncle's guidance, it became clear she's actually capable if she puts her mind to it.

She has a boyfriend she started dating after he confessed before summer break, but they haven't even kissed yet.

Her boyfriend is going on a short overseas study trip during summer break, so she decides to visit her uncle's rural home with her parents. Driven by curiosity, she loses her virginity to her uncle.

She also awakens to the joy of learning, and to devote herself to both sex and her studies, she decides to spend the rest of her summer break alone with her uncle in the countryside.