If you want to enslave Val (or want her to become your willing lover), read this transcript if you're curious to see what's gonna happen during it.
Wondering how you ended up on this route to begin with? Read the intro transcript.
This transcript starts from that you find the first Secret Note in the Dungeon until the end of the route (both her becoming a willing slave and if you decide to enslave her).
Note that Sarah must be in her Eager to Please form for this route to play out.
Transcript
Sarah: [Protagonist], I found something.
Protagonist: What is it?
Sarah: It's a note! It says there is a secret class taking place later in the physical class. See?
Protagonist: Hm... You're right. I didn't even know there were secret classes. Good job finding this.
Sarah: Thank you so much! I'm so glad I was able to please you!
Val: What is with you today? You're as needy as a puppy.
Sarah: I can't help it. I just want [Protagonist] to like me!
Val: [Protagonist], did you do something to her?
(Tell her the truth)
Protagonist: Well... I might have made a few small changes to her.
Val: [Protagonist]! You can't just go around changing people!
Protagonist: It's okay. She likes the changes I made. Don't you, Sarah?
Sarah: O-Of course I do! You can do whatever you like with me!
Val: Well yeah she says that now, but what about before? What were you thinking?
Sarah: Please stop being so hard on him/her. I'm happy he/she made me like this, really!
Val: I think being under the spell makes you a little bit bias.
Protagonist: Well, I can't undo it. So, you'll just have to believe her.
Val: I can not believe this! You've had magic for less than a day and you are already abusing it!
Protagonist: Look, it's not like I can undo it, so let's just drop it. I won't cast the spell on any more students okay?
Val: We have to tell someone though. There must be someone who can undo the spell at school.
Sarah: No! Please don't tell anyone! [Protagonist] might get in trouble!
Val: ...Alright, here's the deal. No more slaves. I'll keep this a secret, buf if you cast that spell on any other girls, I'll have to tell someone.
Sarah: Thank you so much, Val!
Val: ...I'm sorry you have to stay like this, Sarah. [Protagonist], I really don't want to see you causing trouble like this. I'll let you slide this time but please let this be enough.
Val: Let's just... let's just go...