Soyo, Congratulations, You've Been Optimized

When Nagasaki Soyo woke up, she found herself back a little over a month in the past. The shocking kneeling scene hadn't happened yet, the evil pink-haired girl hadn't appeared, and the wicked cat hadn't yet led everyone in performing "Haruhikage." Nothing had happened yet. Even so, she felt that another chance wouldn't be enough to set things right. Looking at Little Saki, who had blocked her long ago, Nagasaki Soyo felt that the clever schemes she'd always been proud of had been nothing but a joke book from the very beginning.

Just as she reluctantly decided to put reviving CRYCHIC on hold, she discovered a new "teacher" in her class, a girl named Tsuzuki Chihiro who hadn't existed in the original timeline. Despite being the same age as Soyo, this girl had pretended to be a substitute teacher and freeloaded at school for an entire week. Despite having no money, she managed to talk her way into a free stay at a luxury hotel by pretending to be someone else. This girl was a talent, someone who might be able to help Soyo make her wish come true!

And yet...

"Soyo, the job is almost done, and everyone's back on the right track. Why aren't you happy?"

"...But I never asked you to take my face and replace me!"

[MyGO + GBC setting, multiple female leads]