It is sinabi in the novel that he is 21. (According to the novel Christine is about this age too, but I think ALW misunderstood a sentence saying "she was as innocent as at the age of 16" that's why she is younger in the musical.)
posted sa loob ng isang taon na ang nakalipas
Thank you, also thank you about Christine's age too, I didn't know that!
rapunzelflynn
posted sa loob ng isang taon na ang nakalipas