Ultraman: The Path to Redemption

(The protagonist is female. She has a CP, but it doesn't get much screen time and is mainly there to advance the main plot. There are several side couples, so ship whoever you like. There's a System, but it doesn't play a major role.)

In the vast and boundless Ultraman universe, there are countless villains, but most of them meet a bad end.

What? Belial turns evil, gets beaten up over and over by youngsters, and is repeatedly dug up just to be beaten again? I'll go back to before he turns evil and change his heart. Then I'll rescue Belial and leave the Reionics behind to await some attention from his son.

Belial: I want to beat her up, but I can't bring myself to. This is so annoying.

What? Tregear turns evil after being driven to it by that hopelessly straight man Taro and his scheming boss Hikari? And he has to go through all that family drama? Don't worry, I'm here!

Tregear: Compared to Taro, she's the light that will always shine in my heart.

What? Jugglus Juggler keeps getting doubted because his ideas are too practical? His misunderstandings with Red Kai keep piling up, and he's becoming more and more obsessive? Don't worry, you've still got me. I'll back you all the way. No power? Leave it to me.

Jugglus Juggler: She's the person who understands me best in the world.

What! Mizuken Saki's brother is gone, and she's so devastated that she wants to take Earth down with her? Someone that good can't be allowed to do something like that. Let me handle it.

Mizuken Saki: She's just… I'm crying so hard.

…

But as she continues on her path of redemption, a vast conspiracy slowly begins to surface…