Chiyo Mihama somehow skipped five grades at once, being in tenth grade at ten years old. Now she was in her second year of high school at age eleven. Although she was short even for her age, skipping grades meant that she was way shorter than her classmates. She always wanted to be taller because few people took her seriously.

One day, Chiyo was in her school uniform, walking to school with Sakaki, a friend of hers. Sakaki noticed a stray cat with gray fur that enjoyed going out of his way to screw with her. He seemed to leer at Sakaki before somehow firing a beam of light from his mouth not at her but at Chiyo. After being hit, she said, "I feel strange…"

As she got onto her knees and used her hands for stability, she started growing in an unnatural way. All that changed seemed to be her size since she still looked like an eleven year old girl. Chiyo's clothes grew with her until she stood fifty feet tall. Chiyo saw Sakaki and said, "This is not what I meant when I wanted to be tall!"

Seeing how Chiyo still looked cute even as a giant, Sakaki said, "So you can be cute even when you're tall,"

Chiyo asked, "Miss Sakaki, would it be okay if I picked you up?"

Sakaki was curious how it would feel, so she said, "Yeah…"

Chiyo scooped up Sakaki and raised her towards her face. She said, "You look different up close compared to on the ground!"

Sakaki fell on her butt on Chiyo's palm and realized how good it felt to be held. Chiyo's hands were soft and warm. Sakaki looked happy in her hand. Chiyo asked, "Do you want me to take you to school?"

"What? Oh, yeah. Feel free to do so."

When Chiyo arrived, everyone stared at her. She made sure not to step on anyone and minimize how much property damage she caused.

When she arrived in class, she had to see and listen to the various teachers that shuffled throughout the rooms through an open window. Yukari asked, "Chiyo-chan, how did you get so tall?"

"A stray cat fired some sort of beam at me,"

"For real, though, how?"

Chiyo realized how unbelievable her story was and said nothing more.

When Nyamo came in and noticed that Chiyo was now a giant, she said, "I know growth spurts are a thing, but this is quite a stretch,"

"This size is unnatural," Chiyo said.

Chiyo had to avoid stepping on people every day even if she wasn't at school. She also couldn't fit indoors anymore.