You're in a room with your oshi and a /vt/ anon who's also a big fan of hers.
One of you will change your real body to become just like hers, same voice and everything. While the other tries to guess who's the real one and who's the fake.
If the guesser gets it right he can marry the oshi, if he gets it wrong the fake oshi can marry the real oshi.
Do you choose to be the fake oshi or the guesser? How do you plan to win?