As someone who transmigrated, Su Yong is both a success and a failure.
He succeeded because he transmigrated and gained a face that even the gods couldn't refuse. More importantly, compared to transmigrators who had it rough from the start, he was lucky enough to be taken in by a goddess.
As for why he failed...
First, naturally, despite being a transmigrator, he doesn't even have a System of his own. That's undoubtedly a failure.
The second reason is the goddess who adopted him: Hera!
A staunch supporter of monogamy!
Clearly, under the watchful eye of his adoptive mother, Su Yong, with a face even the gods can't refuse, has to say goodbye to the idea of a harem!
Tragic!!!
But... what should he do about all the girls from different worlds around him? If he picks just one, will he get NTR'd?