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.

Tactics
Bodyguards deals exclusively physical damage, and have no other attacks beyond high-damage attack and occasionally skipping turns. As they're immune to lust, it's simply a matter of who's tougher and who breaks first.

Scenes
Victory scenes
 * 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 whether Lust Doll would be pursued by only the police or both the police and the Don's men.

Defeat scenes
 * Losing the battle leads to Lust Doll being captured and becoming Don's slave.