Ayaka Yukihiro was rich. Extraordinary rich. But there are some things you can't buy with money (or even Mastercard), and that's love. Ever since child teacher Negi came to her school, Ayaka has been adoring and admiring the 10 year-old teacher, much to the chagrin of Asuna, her longtime rival and on-and-off friend. Her being the student representative, though, means she gets to see Negi quite a bit. Though sometimes Ayaka wondered to herself: did she actually like Negi, or does he merely remind her of the little brother she never had (he died before birth)? Ayaka tries to not think of that often, but one thing she knew for sure: she wanted to make Negi (and in the process, herself) happy.
One Sunday morning Ayaka was walking around the school, admiring the beautiful gardens and feeling the cool summer wind blowing in her long, blonde hair. She gave a happy sigh as she stood there and felt the breeze, thankful for the one day a week where she didn't have to worry about homework or getting things prepared for class. Shortly into her walk, though, she saw a familiar person not too far from the school garden: it was Negi! He seemed to be making a circle in the dirt with a staff, placing a little pebble in the center. Ayaka had to know what was up.
So Ayaka walked...er, ran, up to Negi.
"Good morning, Negi-sensei!", she smiled as she came up to the boy, hugging him from his backside. "How are you?"
"I'm f-f-fine, Ayaka-san", Negi replied, feeling a little dizzy from the sudden impact and for Ayaka's chest pressing on his back. "Nice to see you, too."
"What are you up to, sensei?" Ayaka asked, letting the child teacher go from her grasp. "It looks like one of those 'magic circles' that conjures up demons from one of those horror movies."
"Oh, it's nothing like that", Negi assured his student. "But...I don't know if I can clearly tell you."
"Negi-sensei!", Ayaka pouted, placing her head next to his. "I'm the Class Rep", she continued, this time looking much happier, rubbing Negi's head with her right hand. "You can tell me anything. I promise I won't tell."
"Well, okay...", Negi said reluctantly, whispering to Ayaka in her left ear that he was creating a magic circle to make an object in the dirt grow.
"Wow!" Ayaka exclaimed, once again rubbing Negi's head. "You have a cute, childish side in addition to being mature and sophisticated. You're so great, Negi-sensei!"
"But it's the truth!", Negi whimpered. "I'll even show you. Just stand back."
Ayaka did what Negi was told. Regardless of whether or not he was telling the truth, she was happy to see the confident look he got on his face whenever he worked hard at something. Negi then proceeded to lift up his staff in front of him, and recant the magic works:
"Incresco Tantus!"
And with that, a blinding, light blue light came from his staff. However, the light bounced off a nearby tree, not only missing the pebble in the dirt, but it collided with a different target: Ayaka!
"OH NO!!" she and Negi screamed at the same time, worried by whatever circumstances had just happened. By the time the flash of light was gone, Negi saw a very big sight: a 30-foot tall Ayaka!
"Huh? Why is everything so tiny?" was Ayaka's first words after the growth finished. The newly born giantess then looked below her field of vision and saw a tiny boy where her teacher once was.
"Negi-sensei, you're so cuuuuute doll-sized!" Ayaka squealed in delight as she picked up her teacher and embrace him in her arms, his head resting on her new sized chest.
Uh-oh... thought Negi to himself, hoping no one saw him. Especially Asuna.