It certainly is a clusterfuck. While Jisu and Leffen are both in the wrong first for framing Zero and ruining his life - I do find it weird why he didn't just deny the claims from the beginning. It then just becomes a case of he said this, she said that. Someone did a video that went over Zero's case on YouTube. That said, I do think he deserves a second chance.
ZeRo's explanation boils down to him having been depressed and not having enough clarity of mind to set up a proper defense at the time. Still, I find it hard to believe he waited for so long unless he thought there was enough evidence to back up allegations against him. Anyway, things will become clear if the case goes to court.
I don't support ZeRo, but you would be a legit idiot if you support the artist from the scheme she's pulling off lol.