Kokoro, Koi ni Arazu.

Kokoro is a dedicated office worker who appears stern to those younger than her. She resides alone in an apartment she owns. After drinking heavily at a bar, she suddenly invites Kei, a self-assured and attractive bartender, to move in with her. He accepts, and their shared living arrangement results in frequent complications. Her initial belief that she could never be interested in someone like him begins to waver.