(1) A low-ranking researcher x a cold, pathological merman king
Chen Yu was an orphan, timid and cowardly. Beneath his lab coat was a body unlike other people's, and he wrapped himself up tightly, afraid to raise his head and meet anyone's eyes.
He was the lowest-ranking researcher at the institute, and no one would remember what he looked like.
That was until the institute captured a merman. Its tail was dazzling and colorful, glittering with light, more beautiful than anything Chen Yu had ever seen.
That night, Chen Yu found a young man in his dorm room.
Chen Yu's perception was altered, and his desires were amplified. At last, he had a family member.
He secretly nursed the young man, thinking of himself as his mother and raising him with meticulous care.
Chen Yu grew gentler and more thoughtful. The eyes that had been hidden beneath his fringe came into view, and he smiled with his eyes. Before long, he attracted the attention of the other researchers.
Since when had their institute had such a delicious... homemaker?
Only after Chen Yu returned to normal did he understand how terrifying a thing he had done: he had treated the 300-year-old merman king's clone like a child and coddled him.
Terrified, Chen Yu trembled and followed his colleague without hesitation as they fled. But when he stepped onto the boat, he noticed that his colleague's palm was sticky. He lowered his head and saw familiar scales on that hand.
"Why did you stop?"
A sinister voice came from above.
"Mommy, what did you see?"
(A gentle, 35-year-old, honey-skinned homemaker and his 300-year-old cold, violent merman child. The unusual feature mentioned here refers to his exceptionally good physique, nothing else.)
(2) An unloved prince and a bewitching magic mirror that can grant wishes
When Chen Yu was born, he was declared to have impure blood. He was abandoned in a palace for eighteen years, and no one ever cared about him.
His father hated him, his older brothers bullied him, and his younger brothers tormented him.
During one of their pranks, Chen Yu accidentally stumbled into a long-abandoned attic.
There, he found the legendary magic mirror.
He made a wish.
"I wish someone would love me."
When he opened his eyes, his family surrounded his bed, their faces full of concern. They gathered him into their arms, pressing affectionate kisses to his cheeks and lips.
Chen Yu did not see the emptiness in his family's eyes. He blindly clung to the last bit of affection he had.
It was only when his older brother shattered the mirror and grabbed his hand, pulling him out of the illusory dream, that he shouted, "It's all a dream! You'll die!"
Chen Yu returned to reality with marks all over his body. His memories of the past had grown blurry, and the only thing that felt real to him was his swollen belly.
He was pregnant.
The magic mirror's child.
Chen Yu now had two choices: stay in reality and endure his father and brothers' increasingly twisted possessiveness, or return to the mirror and seek out the monster sealed inside.
Chen Yu chose the latter.
(The bottom and his father and brothers are not related by blood. They can see his life in the mirror's reflection, watching him marry and have a child. His father and brothers will regret it too late. The top is the mirror.)
There may also be:
World Three: A weak, puppet-like holy son x a succubus whose entire clan was wiped out (the succubus needs the holy son to grow their race)
World Four: A neglected, pitiful bride x an evil god who is worshipped (not a traditional deity, but an idol; the idol itself is the god)
And so on.
[Important notes]:
1. The top and bottom are monogamous, and both are virgins; no switching or splitting them up (but the top has many, many secret identities).
2. Includes forced love, deception, pregnancy, and other melodramatic tropes. I'm not responsible for content warnings, but the romance is quite sweet.
3. A collection of stories that could also be considered a slow transmigration. The top and bottom are always the same people, just a couple in different worldlines.
4. The bottom is a timid, honest, honey-skinned man with an incredible figure, full in the front and back. The top is utterly obsessed with him and loves treating him like a woman. There will be scenes of him wearing skirts and being called mommy.
5. The bottom is very beautiful, an honest homemaker with drooping eyes. Even when the top bullies him badly, all he does is cry, so don't expect him to fight back.
6. The top loves him so much he'd rather die in the bottom's arms.
7. I've run out of inspiration for the previous prompts, so feel free to come up with your own, babies.
Theme: Work hard and be self-reliant