Harlequin must really be expanding their product line: In addition to Polecat’s relatively recent discovery of the romance novel manga, I just found out about a Harlequin dating sim, Harlequin Presents: Hidden Object of Desire, while researching otome games for a previous post. The game was released some time last year.
Here’s the blurb from Big Fish Game’s website, the distributor of the game:
“Allie's on a quest to find some breaking news in the Kingdom of Adamas, but must now choose between her friend's well-being and true love! The bachelor Prince of Aristo is the most enchanting man she has ever met, but she must fend off his charming advances long enough to figure out what is going on.”
In addition to the game, I think you're given a digital copy of a romance novel based in the same romance novel universe as the game. More details can be found at this review on the Dear Author blog, including screenshots.
I’m not sure how exciting the whole thing sounds, since it appears that you don’t even have any choice in your love interest. It really is a visual novel, maybe even more linear than most VNs, but maybe that makes sense for a company that makes its money being a factory for trashy books.