The line comes from Puella Magi Madoka Magica, the 2011 anime in which Kyubey, a mysterious white creature, recruits young girls by offering to grant a wish if they become magical girls. The show subverted the cheerful magical-girl genre, and Kyubey's polite sales pitch became one of its most quoted moments. Fans clipped and shared the invitation across anime communities, where it is now used as shorthand for a deal that sounds too good to be true.