OBA-143 I want to tie up Mom! Iori Ryoko

Sudden news of death──. After losing her beloved husband to illness, Ryoko was left with a huge void in her heart and spent her days listlessly. Unable to bear seeing his mother like this, Kenji, her only son, wanted to do something to cheer her up. One day, while going through his father's belongings, Kenji found a scroll. The scroll was titled 'Kinku Gorin-sho.' Kenji devoured the contents of the scroll. And thus, Kenji learned that his mother, Ryoko, had an unusual interest in 〈bondage〉…