After a great cataclysm, humanity entered the age of beast tamers.
The moment a tamed beast is contracted, some of its abilities and traits are randomly passed on to its tamer.
Before making a contract, nobody knows what they'll get.
You only find out after signing, and even a negative trait is almost impossible to undo.
But Lu Yi, who transmigrated into this world, has a panel that lets him see what traits he'll receive in advance.
For everyone else, making a contract is a gamble with their life. He can pick and choose.
The big sister next door, a cowgirl; the bunny girl who dropped from the sky, his childhood friend...
If he wants a dragon girl, all he needs is [sheep beastification (horns) + crocodile beastification (scales) + bat beastification (wings) + lizard beastification (tail) +...], and he can build himself a dragon girl.
What? You want an Eastern dragon?
Then all you need is [deer beastification (horns) + fish beastification (scales) + snake beastification (tail)...]
"So after all that, I still have to put one together myself?" said Lu Yi.
Mark it.
It was alright, but I felt it would have been better to give the main character some backstory; the sudden introduction felt a bit abrupt.