You may have overlooked the game's narration. About the Yoru’s relationship, I think you chose the red color option 'Approach her threateningly' when you talk to her, then the relationship changed to Apprehensive, you can change it to Unwillingly Obedient by offering money, but never Obedient. So if you wanna change it to Obedient, I think you should choose the other option.
By the way, I follow the V20 guide, no problems in v21 game so far.
Beside, I have a good way to avoid the torture of making money through the mini game.