[Chinese History] The Crown Prince's Confidant, but on Nightmare Mode

[Hello, Challenger xxx. Welcome to the Social Pillar Minister MOD. The identity you rolled is "Heir Apparent's Confidant." Choose your ultimate goal: 1. A notorious court villain. 2. A minister who serves all under heaven.]

Here are the rulers and heirs apparent you are about to assist. You are forbidden from changing masters or switching sides. (Even if they're villains, you must stay loyal to the end.)

[Qin]

Fusu, who is about to be ordered to commit suicide.

[Han]

The unlucky Marquis of Haihun, a disgraced emperor who makes an average of 40 mistakes a day.

[Wei]

"As gifted as Chen Si, as mighty as Taizu," but the unlucky Wei emperor Cao Mao, who was drenched in blood at a young age.

[Jin] [Tang] [Song] [Ming]

Challenger: ?

Do I even have a choice? The boss is about to die, and I'm not allowed to jump ship?

[An ambitious but ill-fated emperor or heir apparent x a beloved confidant who "never abandons" them but is actually thinking of running away every single day]

Historical crossover. One-on-one romance in each world, with different protagonists.

Theme: Never give up