Takane no Hana-san

These share similar vibes. Both feature women known for their cold personalities at work, but are secretly in love with the golden retriever-esque ML. Both FLs have exaggerated acting and crazy inner monologues that add to the comedy and increase the sweetness factor.
I can't watch one of these without thinking of the other.

Genres: Comedy, Romance, Life, Drama
Tags: Workplace Setting, Office Worker Female Lead, Office Worker Male Lead, Competent Female Lead, Innocent Male Lead, Workplace Romance, Childish Male Lead, Secret Crush, Hidden Personality, Adapted From A Manga