Kana's parents passed away seven years ago, and she had to drop out of school to work and support her younger brother. She thought that by pampering her brother, he would feel her love and be obedient and study hard. However, contrary to Kana's expectations, her brother continuously gambled and joined a gang. One day, he returned home in a state of fear. After pressing him for answers, Kana found out that her brother had stolen money from the gang leader and spent it all on gambling. He was summoned to meet the leader, and it was certain that he wouldn't spare his life. Heartbroken for her brother, Kana decided to go with him to plead for mercy from the boss. As soon as the leader saw Kana, he was captivated by her beauty. He agreed to forgive her brother's debt but with one condition: she must become his woman within ten days!!! And so, her new life began. She was only allowed to wear lewd or naked underwear so that he could fuck her whenever he wanted, even in front of his juniors. But the feeling of happiness from the big, big cock of the big guy that her lover could never give her. Her body gradually fell in love with his cock and couldn't live away from him. Finally ten days passed, she was able to leave here and her brother was also cleared of debts. But she didn't want to go, she wanted to be with him forever, to be fucked by him and to enjoy this feeling of happiness...