Responses
It's from another author, called JiuGong.
This Valentine's Special was a crossover made by the both authors, and each of them made a 2 part special in their own columns at Dongman Manhua website. I don't know who's translating 18 Unlimited, but JiuGong's part will probably be translated by the other translation team. It wouldn't be nice of me to interfere in their work.
Where did yushu came from? Can anyone give me their manga link?