Ristorante Paradiso, Koi wa Ameagari no You ni Recommendations
Ristorante Paradiso is a Josei and Koi wa Ameagari no You ni is a Seinen, two series dedicated to appealing to older audiences. Both series feature a main female character who has an attraction to a much older gentleman. Plenty of romance and slice of life elements, complete with mature and realistic characters.
Same premises, young girls having certain problems with their lives start to work in a restaurant, and falling in love with older gentlemen in their respective places.
Ristorante has more unique characters, while Koi shines in it's depiction and artworks.