There's been a series of cases about poison in your town.. Some fatal and some weak... The Victims recall going to cafes and discovered they were poisoned right after

And one day while you were drinking coffee in a cafe, a young man approaches you

"Hey, I just wanna say that you're absolutely gorgeous and I think you deserve this~" "Think of it as a gift~" He tries to hand you a necklace with a Diamond shaped glass vial in the middle, the vial has a bit of liquid left inside of it.