Yakuza 5 Remastered

You can unlock this achievement by playing as Haruka in part 3 but you can't unlock it until Chapter 4. In order to get to it, you need to complete 5 other dance battle stories. They're all set at normal difficulty but can be made easier by completing trainings with Yoko and equipping heat moves. Completing Tatsuko's food tracings can make things easier also because he gives two bars of health, though you need to eat at a restaurant to fill the second one (I know because I tested it).

Anyway, the first two open automatically. The third one opens at the beginning of Chapter 2, and I had 3-6 unlock one after another, though 6 can't be completed until Chapter 4. Once it starts, head to just south of Iwao Bridge on the eastern side. At the corner, you should see a white door with a white box with a black "!" on it. That's the Event Hall, where the final Dance Battle Story takes place.

Save if you care about winning, since, while it's considered normal difficulty, she puts up a fight. However, you don't actually have to win. I lost my first attempt but unlocked the achievement anyway. When I reloaded, I took out her health, which was the only reason I won.