After competing in the Underground Colosseum in Chapter 9, you’ll be able to continue on to Corneo’s Mansion (after completing or skipping some side quests), which ultimately leads you to the Honeybee Inn. Here you’ll have to engage in a dancing minigame, which requires you to hit specific buttons ([Triangle], [Circle], [Cross] or [Square]) at the correct time. You’ll get a chance to practice this before starting the actual dance with Andrea, which itself is comprised of three phases over which you’ll need to hit a total of 28 notes. Depending on your timing you’ll be scored “Great”, “Good” or “Bad” on each press, and the game’s pretty generous - you can earn Andrea’s reward (and this trophy) with a score of 22 Greats, 4 Goods and 2 Bads. You don’t need to be perfect, just decent.