Would be a solid 4: very well made, but not rivaling the best in the genre.

However, Jun exists.

She looks like a small child. But far more importantly she constantly acts like a prepubescent child. Yet she is involved in sexual conversations, and a relationship with the MC.

She looks like a child, she acts like a child, she is often treated like you would a child. Why is a she a love interest in an AVN?