Other than meeting a ghost or another 'supernatural' kinda person, not like you can do much about it versus trusting someone to tell, and that leading into a love story too (tho i feel like the loudness next door would be noticed even if he didn't have powers or so)
if not 'prove' your power and charge ppl for it or so lol XD; but we won't rly know til he gets more of a spinoff/focus