I'm an undercover agent. My target is the younger foster sister I bonded with at the orphanage. My mission is to make her blush, make her fall for me, and win her over.
To be precise, my boss thinks she has the potential to become our witches' number one enemy, so she wants to lure her away from the Night Watch and bring her over to our side.
What my boss doesn't know is that before I became a witch, I was her foster big sister.
So this undercover mission is just an excuse for me to escape witch territory. I hate that liar of a little sister who once deceived me.
Unfortunately, I was framed and sent to prison. To escape, I have no choice but to become that liar's foster big sister again. And now there's also a little witch underling who failed to break me out and has started keeping an eye on me.
In the end, I still have to carry out the undercover mission.
The difference is, along the way, I'll deliberately reveal that I'm an undercover agent, even making her think that someone is impersonating her foster big sister, and that a wicked witch is deceiving her.
Once she believes I'm an impostor witch, I can prove that a liar will always be a liar.
Because I'm a liar too.
The problem is, I messed things up, got a scolding, and somehow attracted the attention of the liar's biological big sister.
Wait, what do you mean my old flame is your biological big sister, the one you thought was dead!?
Wait, what do you mean my boss is willing to put aside her grudges and team up with you to deal with me!?
Aaaaaah!
...You bunch of liars.
Being an undercover agent... really is a thankless job.