Shinjin Hatachi no Onee-chan AV Debut!! Yuuki Rin - Nee-chan, Ikura Nandemo Ikisugi Daro...

"Yuuki Rin is a brilliant student attending a prestigious private university. Even from her younger brother’s perspective—mine—she’s beautiful, has a great personality, and is someone I can proudly show off without feeling embarrassed. We often go shopping together or hang out, and we’re so close that people sometimes mistake me for her boyfriend. But then, one day, she dropped a bombshell.