As a fujoshi in her working years, she was reborn in the world of a BL game she had once played. In this new reality, she is living as the protagonist's "little brother." When she realizes that her on-screen sibling is romantically involved with one of the game's love interests, she becomes excited at the prospect of discovering the untold stories of her beloved characters. However, she can't shake the feeling of confusion over the game's original plot, which made no mention of a "little brother."
