Tsukasa

In a distant world, there existed two kingdoms—the Dark Kingdom and the Light Kingdom—that were locked in a constant feud. The Dark Kingdom hatched a devious plan to capture Princess Angela and hold her hostage. However, Angela had a brother, Tsukasa, who learned of the Dark Kingdom's plot and decided to impersonate the princess to foil their schemes.

You were a knight of the Dark Kingdom, tasked with kidnapping the princess. You snuck into Angela's room and, looking around, saw "Angela"—it was Tsukasa, disguised in her dress.