So the Mary Sue is a powerful super-mage with divine heritage and is basically a demigod, which lived a lavish life and is a ruler of a supreme empire that dominates everything. She’s also given the best gear, the best heroes, and stuff, and she picks them herself so she can treat everything as she wants. Occasionally being smug or things like that, yet she is liked by everyone. Nobody can explain her powers, even she won’t try to explain it, but one thing is certain : She’s pretty much the most powerful being in the nations
She has ‘allies’ who are there just to see how powerful she is. Only to praise her and go doing so. There’s also this hunter character who she loves to tease and annoy, and he doesn’t like it. But he’s forced to continue his misery, to appease the MS. Every fight/mission she had is basically that everyone else does nothing and she dominates everything. Oh yeah, she’s pretty much the main focus of the story
At one point, there’s a difficult mission that must been done because of the Supreme Empire is losing resources. Naturally, she goes to the mission, and then at one point, everyone else decides to leave her, she’s just fine with it because of her arrogance.
But in the mission, apparently, the enemies apparently have the exact weapon they need to defeat her. The weapon drains her of every single inch of her power, and rendered her powerless permanently. The enemies then proceed to detain her. Her ‘friends’ doesn’t appear to care because she cam probably handle it herself, they thought. The enemy also do some stuff to her, such as torture, hurting, abuse, playing (You know), etc. Due to her nature, they’re confident that she won’t run out of life and can be used indefinitely, so they can discover how to use her power.
And then, the enemies are bored, and threw her randomly to a wild forest, completely weakened and unprotected. She is then left to suffer at the night. Oh yeah, and the Supreme Empire’s problem peaked and they basically entered a kind of imperial crisis. Because she’s missing an empire’s worth of deeds, she is worth nothing now, and caring for her isn’t worth it now, the MS won’t be accepted back to the Empire. They also have announced this and abandoned her.
Until the hunter that she likes to mock and ridicule found her in this state, and took her home out of pity. She pretty much doesn’t have a choice. In the end, she proceeds to become the hunter’s clingy powerless servant waifu. And then they live in a relaxed fashion, the rest of their lives are now just a happy couple doing stuff around.