This story is also known as The Mermaid's Weight-Loss Diary~ -v-
Qu Han was bored, so he sneaked aboard a research vessel and secretly raised the little mermaid they had captured, without the rest of the crew knowing.
The little mermaid was chubby and so silly that Qu Han could stop it in its tracks just by poking its forehead through the glass.
The research institute devised a mutation program for juvenile mermaids. After being fed mutated meat, the little mermaid grew fierce and unruly, gradually becoming like a real monster.
But when the monster, snarling with hunger, spotted a familiar lock of golden hair with a soft curve through the glass, among the cold white coats in the corner...
It gently closed its tightly packed, terrifying teeth and whimpered, "Han."
"What kind of mysterious incantation is 'han'?" the research team wondered aloud.
Qu Han, who had only come to watch, tugged at the corner of his mouth beneath his mask. Tsk, time to put you on a diet.
"Wednesdays are fasting days. There'll be no food, just a human to keep you company."
*
The mermaid grew faster than anyone could have imagined. Qu Han had been half-willingly using it for psychological experiments, but now he began to have a bad feeling.
After his nth time having his pheromones sucked away on the excuse that it was hungry, Qu Han, a perfectly ordinary beta, pushed away the heavy head resting on his neck in disgust.
The big head lifted. The crazed devotion in its raven-dark eyes faded, replaced by clear-eyed innocence.
"Han?"
Qu Han looked at the arm wrapped around him, which could snap a white coat in half, then at the handsome, dangerous mermaid trying to act cute at the worst possible time. A false smile appeared on his face.
The kid had grown up. Tonight was the night to set sail.
On a stormy night that looked much like the one when the mermaid had been captured, Qu Han sailed away in the middle of the night.
As the research vessel shrank to a speck in the distance, Qu Han smiled faintly. Goodbye, little monster.
The next second, the boat capsized.
A huge tail had flipped it over.
*
Waves towered over the sea.
When sharp claws and fangs drew close to his vulnerable neck, the threat of death made Qu Han's heart pound. Only when sticky drool slid onto his pale, slender collarbone did he hear a low, eerie voice beside his ear: Don't be afraid. Today is a mermaid fasting day.
Mermaids are born able to detect lies. Awakened from infancy by gentle lies, he had learned to wear a well-behaved face.
Qu Han didn't know that every time he turned and walked away, the depths of those raven-dark eyes behind him filled with madness and longing.
Mermaids don't have pheromones, but he was going to mark this beta.
A self-serving, falsely gentle shou who brings trouble on himself X a black-hearted mermaid gong, cute and pet-like at first, fiercely doting later
Theme: Be honest with each other