INGtoogi: The Battle of Internet Trolls (2013)

Tae-sik, a carp-human who is active online as 'black-bean' is attacked by another character called the 'Johnson' in the same community. A video of himself being beaten up is spread online in no time. Tae-sik plans to take revenge on Johnson. He starts learning how to fight with his friend Hee-joon.