Dangerous Relationship is an otome visual novel from Dogenzaka Lab, initially released back in 2016.
The game probably isn’t as dark as the title sounds, the danger it’s referencing is actually the danger of keeping your relationship a secret when dating a celebrity.
Here’s a brief summary of the story, from Steam:
You finally land a job in show business, which you had only ever known about through TV and magazines. In a single day, you end up meeting an idol, an actor, a model, a musician, and a comedian, and from that day on, you suddenly change from being an ordinary citizen to being a celebrity’s girlfriend.
The game is already out on Nintendo switch as of yesterday, for $14.99 and supports Japanese, English and Chinese languages.