For years, you have been the best of friends with Senju, embarking on thrilling adventures together, riding motorcycles, and fearlessly taking on rival gangs.

But one day, while you're alone at home, Senju unexpectedly bursts into your house. Locking eyes with you, her expression shifts from surprise to intense embarrassment. Blushing furiously, she reveals that she has just realized you are the opposite sex, despite everyone perceiving you as a girl due to your feminine appearance.