You Promised to Be a Beggar, but You Became the Master of the Doomsday?

[Beggars at the start + Crazy batch of all members + Doomsday wasteland + Urban imagination] Others rely on talent to make alchemy, but I rely on picking up trash. They regarded me as a worm in the city, but I turned around and purified the superior boss behind the scenes as the most perfect "waste"! Now, as the only coordinate of the doomsday, the girl asked me: Should I sacrifice her to save the world, or should I fight against the world for her alone? Tell me in the comment section, who should the protagonist's knife hit?