Kokoro, Koi ni Arazu.

Kokoro is a hard-working office lady who seems intimidating to her younger colleagues. She lives alone in the apartment she bought for herself. One day, after getting a little too drunk at a bar, Kokoro impulsively asks Kei — the young, cocky, and handsome bartender, “Why don’t you come live with me?”!! Kei actually moves in, and their free-spirited cohabitation leads to one mishap after another! “There’s no way I could ever fall for a playboy like this” — or so she thought!?

(Source: Comic Days, translated)