Rino Sakuragi was used as a practice table by her older sister-in-law who worked at a bubble bath. (caribbeancom051121-001)

Driven by a desire to alleviate chronic sexual dissatisfaction and earn extra money, the ultimate win-win idea led Sister-in-law Sakuragi Rino to decide to work at a bubble bath. However, lacking experience, she decided to practice, buying an air mattress and a lewd chair to use as her practice subject…