I Beg the Heroine to Appear Good, but the Hero Discovers That She Smokes and Drinks in Private

I beg the heroine to be good on the surface, but the hero reveals that she smokes and drinks in private. The heroine is the kind of serious person on the surface, but the hero unexpectedly discovers that she smokes and drinks in private (not that there must be tobacco and alcohol, the main idea is that after the contrast is broken, the heroine will no longer be in front of the hero)