Wen Tingzhou, when he wasn't working cases, smoked, played cards, and drank. Those were his three favorite pastimes.
He just never touched women.
Then Zhou Shi came back.
Wen Tingzhou was done for. Now he only touched women.
Fake siblings: ruthless deputy captain of the criminal investigation team VS fair-skinned, rational, slightly spacey criminal psychology researcher.
Zhou Shi acts flirtatious but is a total coward inside. Wen Tingzhou acts like he doesn't care, but is secretly a shameless flirt who can't wait to get her into bed. One kiss turns him into a big, clingy puppy...
-- "Deputy Captain Wen"
-- "Little sister"
Theme: Finding wives for our heroic police officers!
It's very well written, why don't you write it again?