Becoming a Magical Girl

[Slightly depressing, then a hundred 1v1, micro-knife with sweetness] She’s an agent and an idol. She used to be the “older brother,” but now she can only disguise herself as a man, struggling to maintain her dignity as a brother. Until… she saw her sister standing in front of her, holding an exaggerated support sign, her eyes sparkling. She was dumbfounded. I’m your older brother!