For me its
Mayumi Honjo. She doesn't have big boobs nor those stunning pretty face. But somehow she does tickle my bone.
I first notice her in
sbnr-327 , sadly my copy from the net is abit buggy.
Okie I really think I got a weakness for virtuous+mature+vulnerable+troubled wife look . 100% sold
And she does doggy with curled legs even ++++ for me
Her acting is not exceptionally remarkable but I wouldn't say fail. One additional feature about her is her voice. It sound very anime-ly cute. But its not those overly nasal forced anime cute. I rather like it a lot though. Not sure it works for you, gotto hear it to decide.