My Boss's Kitten(2017)

Buchou no Nyanko

Aya was deserted right before her marriage and was left without a place to live. One day, she finds herself wandering back into the house she was supposed to own after her wedding. To her surprise, the cold-blooded boss she hates from work had moved in as the new owner! A dangerous love ignites under one roof between the girl who lost love and her sadistic boss!

(Source: Kodansha USA)

Note: Includes an extra chapter.