Yin Yang Shi: Ping An Wu Yu

Both short promotional anime for their respective franchises' video games. Both are almost exclusively for dedicated fans of their franchises and simply provide additional content and lore. 

These are both short comedy series that were originally of Chinese origin. They take little time investment and so are very easy to get into and have great senses of humour. They also both have great character designs. 

Both are these series are short in both run time by episode and total episodes, neither surpassing a hour total run time for the entire show, so both require little time investment and are easy to get into and finish. They have very similar tones as they are short comedy series based off games which star characters from the game. Unsurprisingly they are played up comedically in a gag/parody manga style of the characters you can play as/with in the game. If you enjoyed one of these series I'm almost certain you'll enjoy the other whether you played the game or not.