Mo Er was kidnapped by something claiming to be a System
and made to play the villain in an unfamiliar world.
Enticed by the System's extravagant promises,
Mo Er wore the terrifying mask that marked him as the ultimate villain and opposed the overpowered protagonist Qi Shangjuan at every turn.
When it was time to strike, he never held back.
But the tasks issued by the System gradually grew strange:
Invite the protagonist to dinner.
Give the protagonist the first rose of the night.
Huh?
This isn't what we agreed on at all.
Qi Shangjuan was born in the bottomless abyss.
His heart had long since grown hard and sealed itself away.
That is, until he met the little merman beneath the moonlight.
White scales gleamed beneath the moon, like a treasure from the mortal world.
The little merman was different from every other member of the merman clan Qi Shangjuan had met.
Not only did he look different, he was a little silly, always squeezing his tail into Qi Shangjuan's palm.
Every day, Qi Shangjuan met the little merman beneath the moon.
His hardened heart was pried open bit by bit.
But the little merman was like Cinderella at midnight, disappearing when the time came.
Qi Shangjuan grew greedy, wanting to keep him by his side.
The top turns into a young adult merman at night, but he doesn't know it and thinks he's sleepwalking.
The reason for the change in the tasks will be explained later.
Probably a complicated, overpowered-protagonist bottom x a top who's cold by day and a sweet merman by night.
Two strong leads who dote on each other. They fight by day and fall in love at night in the early chapters (not really).
Theme: Loving you is like loving life
After the Heroine Leaves, I Become the New Love Interest with a Happy Ending
A Little White Rabbit on the Moon
One Top, One Bottom, Eating Without Stopping
Three Minutes to Ten [Entertainment Industry]
I Thought I Was a Cool Guy (Quick Transmigration)
The Sickly Puppy Was Adopted