Onii-chan, we have good news. Illya said in Rin's body as she approached Shirou.
That's great, girls. Shirou said
However, to do so, Illya and I must cast a complicated spell inside a magic circle, so that will return us to our respective bodies, Emiya-kun. Rin said
I see, I hope you can get back to normal, girls. Shirou said
Rin nodded at Shirou's comment, and took a piece of chalk and began to draw the magic circle, after a few minutes Rin finished drawing the magic circle.
Are you ready to cast the spell?, illya. Rin asked.
Yes, I'm ready, Rin. Illya said.
So, Rin took her spell book and gave it to illya, so that she would know what words to say, since Rin knew those words by heart, but Illya didn't.
Then both girls got inside the magic circle and began to say words in German, suddenly the magic circle began to shine so bright that it engulfed both Rin and Illya.
After a few minutes, the glow disappeared and the magic circle stopped shining, and only Rin and Illya remained motionless inside the magic circle.
Rin, Illya, are you okay? Shirou asked as he looked at Illya and Rin.
Y-Yeah, we're fine, we're back to normal, Emiya-kun. Rin said
I'm back to normal, onii-chan. Illya said excitedly as she went to hug shirou.
That good. Shirou said.
Well, since everything is settled, I guess you two can go now, Emiya-kun, Illya, I'd like to study the spell that went wrong, yesterday, alone. Rin said, without trying to be rude.
Don't be like that, Rin, what if something goes wrong, I'd like to study that spell too. Illya said as she gave Rin an innocent face.
It's okay, you can stay, Illya. Rin said as she sighed.
Cool. Illya said excitedly.
Well, I guess I'll go home and make lunch for when Saber gets back, see you guys. Shirou said.
Goodbye, Emiya-kun. Rin said
Goodbye, onii-chan. Illya said.
After saying goodbye, Shirou went to his house.
The rest of the day passed calmly and without any other problems, with Shirou watching Saber eat and ask for more food, while Rin and Illya studied the failed spell in case something like this happened again.
End.