The Bodyguards

If Lust Doll confronts the Don without securing Arlene's help, they would face the Don's guards first. This is a tough battle, losing which leads to a Bad End.

They would only be encountered if Lust Doll deals with the guards downstairs. Otherwise, they would be ambushed and knocked out before the battle even starts, leading to the same outcome as losing the battle.

If Lust Doll defeats the guards, they would face the choice: spare the Don, or kill him. Both choices leads to a Bad End; only difference is wether Lust Doll would be pursued by only the police or both the police and the Don's men.