Katesai no Tomato Batake -Seieki Saibai-

A young girl named Kate Sai was spending her summer with her uncle, helping to cultivate crops. She was such a novice in so many ways... but would soon learn everything under the big, blue sky... "Oh god oh god oh god--" "Yes, that's your clitoris. It's a very special place on girls that feels good. Say it." "C..clitoris... uhhnnn! ahahh!"