Monster Fantasy

Monster Fantasy is a video game unique to the Sket Dance Universe. It is considered highly addictive, so much so that it renders players semi-comatose if they play long enough.

Trivia

 * The Naming is most likely a parody of famous RPG series Monster Hunter and Final Fantasy - which usually can take 100's of hours to complete.
 * Bossun's mother Akane Fujisaki, hid her copy away because she found it so addictive.