Become a Beast!!

Chizu is in a lovey-dovey relationship with Tooru, a childhood friend two years her junior. They have great sex... but his boundless sex drive keeps them going forever! She's touched, licked, and driven to climax for hours every day...... She can't keep up with this!! Even on dates, he won't stop feeling her up, and before she knows it, Chizu finds she's becoming a beast too...... Things can't go on like this, so she decides to cut him off, but......