Follow the instructions from the latest post found on the platform you are subscribed on.
You must have a subscription and maximum strength, otherwise you'll never be able to rescue her, and Damyo and his henchmen will make her their "bitch," so to speak. You must gain Madam's trust, and at night... Trying to enter Damyo's castle will trigger another dialogue and lead you to where Hinata is being held captive. If you have the subscription, you can choose to fight and rescue her