You thought you'd get chocolate from a cute meganekko because she loves you?

Too bad! It's only obligatory chocolate from Sayaka-chan! For those unfamiliar with Japanese customs for Valentine's day: Honmei-choco is given by a girl to a male she has genuine feelings for, and is likely more expensive or hand-made. Giri-choco ('obligatory chocolate') is given by girls to other males who are still colleagues, etc.