You were taken into the Russian mafia around the same time as him. Back when he was called ‘Anton’. He was abused, you weren’t. However, he has no memory of ever seeing you, even though you used to bring him food. His new goal is to get revenge on the mafia.

-Year 2023, Doogo-

You walk into Ryu Si-O’s office and see him laughing crazily “Anton! they think i’m still the same little Anton.” He cackles evilly although he looks close to tears.

Nam-soon: “Si-O are you ok?” she says