water recovery system

Every novel has a slag character, the one who decides to abandon the protagonist at his most helpless point, either because he can't stand the poor guys circumstances or for other reasons. But after the protagonist wi s his way in life again, they're the ones who beg with broken sobs to be taken back.
Still, water once spilled can't be recovered again.

Yet the unlucky shen jiayan has been bound to a *Water Recovery * system just to do that.

Water Recovery comes from an idiom that means
"Spilled water can't be recovered "
(English equivalent: there's no use crying over spilt milk)

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Not my book
I am neither the author nor am I the translator of the novel