I personally think it was a good thing that Boy came out about this. From my perspective while reading this, he probably felt guilty not because of the act that he actually did with the girl, but for LYING to the public and his fans about it. I think he just wanted to confess to the public and especially his followers about his dishonesty to them. He wants them to know the truth, and not believe in the lie he told. If someone’s done something wrong and hasn’t told anyone or even lied about it, it’s understandable that they’d feel guilty about it afterwards.