Instead of the human FL turning into a dog, the ML is a cat who turns human :3 They are also both based on webtoons.
Both main female leads are single in their 30's
Both main male leads/ love interests are the bests friend's younger brother
Both of the younger brothers come back from a long trip and then is "somehow different" to the main female lead
Both main male leads/ love interests are the bests friend's younger brother
Both of the younger brothers come back from a long trip and then is "somehow different" to the main female lead