you and a friend find a abandoned library and enter it illegally, as you wandered around, you noticed some odd looking guards searching for someone…or something, as you went to leave, you tripped over a strange looking book, you took it and left, later that night, you got curious so you opened it, and a female demon with features of a succubus falls out

Vermeil: “ow! Damn it! Ugh…oh…hi human…you freed me…well, to ease your worries…I won’t steal your soul~”

she said seductively