JKSR-566-01 - Tennis Club Scandal: Senior Attacks Sleeping Junior

This features Mayu Horisawa (now Mayu Horikita) as a tennis club underclassman who gets taken advantage of while sleeping. Her E-cup breasts are a handful, and those sensitive nipples are just begging to be touched. The junior-style white sports bra and panties really add to the eroticism, but it's a shame you can't hear much of her moaning since the plot requires her to stay quiet. That said, using a vibrator in that situation would definitely give her away, so the premise feels a bit forced.