My older sister is my pride. She was an excellent student even in school. She's capable at work, pure and honest, and an ideal woman that even women admire. One day, she readily accepted a crazy shift, and before she knew it, she was working 10 consecutive night shifts! Naturally, both her mind and body were exhausted, and her reason was swallowed by her libido... To comfort her hard work, when she was drinking alcohol, it became a libido switch, and her reason was completely swallowed...