Actually scratch that. Idfk how it now finally worked. For some reason the scene after the massage with samui is so bugged that you have to slowly click next to progress because if you speed it up by speed tapping, it'll force you to go to the open world in the bathhouse. I'm playing on Android btw. I had to reload that massage part 5 times in order to unlock the full dialogue from Samui after the massage.
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I know it’s been a while but I’m having the same problem right now. Issue is I’ve already progressed loads in the game in other lines before realising the quest never ended because it’s glitched. Does anyone know how I can force the event to end/ force it to start again without going back to an old save file? I don’t want to loose all the progress I’ve made.