One: Do not get advice from Forumosa. We are mostly idiots. Well-meaning, but idiots. Myself included.
Two: Since you have elected to get advice from Forumosa, I strongly advise you to SAVE EVERYTHING. Every single exchange between you and this person past, present, and future should be saved and copied and saved again. The law is on the side of the innocent in theory but sometimes it takes a bit of skill to prove you are in fact innocent. As soon as this person does anything you suspect is illegal or infringes upon your rights (threatening and ultimatums should count!), go IMMEDIATELY to the police so that a record is made. Even if you can’t prove it, you’ll at least have a slip of paper that indicates something concerned you enough to seek police help. I suspect this will go a long way in helping maintain you are a victim, not someone just making excuses and looking for an easy way out.
Three: Keep in mind that anything you have done recently and anything you do from this point on could be subject to very close scrutiny. Take extreme caution not to do anything that would arouse suspicion or give your accuser ammunition against you. Taking pictures of kids through a telephoto lens in a park, for example, would not be a good idea.
Four: Be aware that while you may be innocent until proven guilty as far as the court is concerned, society is a bastard. Being cleared by a court will not erase the psychological imprint of the accused as a “bad guy” in many people’s minds, and so even if it gets to the stage where you can defend yourself in court, you may be faced with employers unwilling to hire someone who has had this allegations levied against him, or friends keeping their distance, or restaurant owners scowling when you enter their establishment. It’s best to settle this dispute as quickly, amicably, and resolutely as possible.
Five: Testimonials and alibis. Find some way to make sure at least one person knows your whereabouts at basically any given time (checking in on Facebook all the time is a good way), and identify a group of trustworthy, hopefully diverse friends (i.e., one from work, one from life, one from a basketball team you play with, etc.) who can vouch for your character and would defend you if need be. Combined, these will help prove that any allegation against you is unfounded quickly. And time is of the essence. You want to nip this in the bud because some damage is irreparable.
Six: Stand up for your rights. There is no reason that you should give in to bullying if it is truly entirely unfounded. If you give an inch, they take a mile, so make absolutely no concessions that you think you’d regret later on in life. If you aren’t willing to leave Taiwan, there’s absolutely no reason you should. Your happiness, from an objective point of view, is no less important than your accuser’s happiness, and from a subjective point of view, your happiness is the only thing that matters. Don’t forget that.
Optional: Quietly dig up some dirt on your opponent that indicates he or she is not trustworthy, some objective evidence that shows character flaws and that he or she may be the kind of person to start arguments and lob unfounded accusations.
If I were you, I would contact my accuser through digital means to keep a record, set up a date to talk about the situation and see how we can resolve it, and RECORD THE WHOLE THING. I would say nothing that is untrue or misleading, would repeatedly stress my innocence, and would try to find a solution to whatever the conflict is with him/her that leaves us both satisfied. Failing this, if everything was irreconcilably doomed to failure with no hope whatsoever, I would take the recording to the police immediately to make a record, retain a lawyer, and file a suit of defamation before any more rumors could be spread.
Again, I’m not a lawyer; almost nobody on Fmosa is. This is just my friendly advice, so take it only at face value. And good luck.