Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @selbsie yapyap! once upon a time, I was an avid fanfiction patron during my K-Pop heyday.
This tweet contains emotions: 
joy, sadness