My childhood friend and first love, Haruki, suddenly appeared before me. Seeing her exhausted and asleep stirred up my desires. Noticing my arousal, Haruki offered to relieve me. From that day on, a strange cohabitation began. Soon after, she confessed that she wanted to become my pet. To fulfill her desire, I put a collar around her neck, and from then on, we spiraled into increasingly depraved acts. Our relationship deepened as we crossed new boundaries together.