there's this manga i read where a bf and gf are put into this room where they have to answer questions right and win a ton of money but if they fail they die

and it turns out they weren't even real people they were clones

and the clone that won was the bf who threw everything away cause he foudn out his gf was cheating on him anyway so he let her clone die so he can break up with her and take a new job to earn big money and rep

but idon't remember what it's called!!