Need a title

There was another guy in the office who liked her but never admitted it he had dark hair, the male lead had light hair and the female lead had dark hair in a bob and the male lead always got acted like he’s was in heat around her but the female lead also acted curious towards him. It’s doesn’t have color and the art style is more newer the male lead had a girl in his past come back to get him but he ended up picking the female lead. They all work at the same office and I think her name is yuki.