When Bea (B for short), one of seven gamer friends, was transported into the Super Mario Realm, she didn't land in the Mushroom Kingdom, but rather in the dark abandoned lands far away. She crashed into a haunted house. However, her husband had crashed straight through to its dungeon. She managed to come to in an hour to find herself being...well, looked-away by a group of Boos. After some questions were asked, she was led down to where her husband was being watched, on the brink of death from the hurtful landing...

B hoped that being in the Super Mario Realm, he wouldn't die, but the Boos said otherwise. So she insisted that they try to conjure up something to put off the death. Fussing with them and peeking behind their shoulders as they took to their books, she had them turn him into a Boo. After the ritual, he was undead and well, and could only be brought back by a 1-Up mushroom.

But what about B? The Boos commended her decision, but couldn't help but find her odd-looking in her tattered modern clothes. Under her husband's direction, they had a band of Eeries used some Boos' shrouds to tailor for her a dress. Delighted by suddenly having a princess-figure in their midst, one Boo declared, "Everyone, say hello to Princess Boo!"

B however thought that was rather off, not being a Princess or a Boo, and corrected, "My name's B." Unaltered, the speaker Boo rephrased himself. "Say hello to Princess Boo B!" The Boos clapped and cackled happily, while B and her husband slapped their foreheads in unnoticed embarassment. Nevertheless, they now consider her one of them, and look up to her and her gamer husband for guidance in the world of Super Mario.