I could recommend my story “Act of Vengeance”. It’s a thriller/drama and it’s set in the 1926’s in Berlin. It has one LI but it’s optional. You, as a reader, don’t have a disadvantage if you choose not to date him. The story has a point system and choices matter. 
And I have to admit that I don’t update often so it can take 1-2 months for 1 chapter because of university and work.