Raising Octopus Juvenile

In order to scare the crying sister, Cecil kept a slimy little octopus.
She feeds, bathes, and instills magical powers to the little octopus every day, and takes it out to play together.
Cecil watched it thrive and hoped that one day, it could “shine out” at his sister’s birthday party.
So under Cecil’s careful breeding, the little octopus grows bigger and bigger…
In the end it became a tentacle monster.
Cecil:? ? ?
Is there something wrong in the middle?

*Small snippets*
It was late at night when Cecil heard the sticky movement.
She walked into the rose garden lightly and saw a young man with a strange face standing in the quiet rose bush.
The boy’s complexion was pale, his black hair curled up, and his emerald-green eyes gleamed with dim light. The evening breeze was blowing, and a dark shadow was slowly creeping around his feet.
Cecil: “Who are you?”
“I…who…?” The boy slowly uttered jerky syllables, as if thinking hard for a moment, slowly tilting his head.
“I…I’m…Lanny.”
Cecil: “…”
“Hello, Lannie.” She smiled, and the left light swept through the blood-stained glasses in the branches and leaves.
——Those are Lenny’s glasses.

Content label: A special liking for another world to wear books
Search keyword: Protagonist: Cecil Supporting role: Other:
One sentence introduction: Raise a big monster
Conception: Fighting against fate, being self-reliant and self-reliant