Entertainer Haha is hitting the books for his upcoming battle of wits against Noh Hong Chul.

On January 19th, Haha tweeted, "I'm about to go crazy~! It's time to start cramming... Ah...Really! I'm going crazy!"

Haha attached a selca of himself looking upset as he holds up children's textbooks on Chinese tetragrams and world history.

Haha and Noh Hong Chul will be going head-to-head for an upcoming�'Infinity Challenge' special, where they'll compete on a quiz involving general facts.

Fans cheered him on with comments like, "Please beat Noh Hong Chul!", "Burn the midnight oil~", and "Wow, seeing you cram so hard makes me feel like I should try harder!"

The 'Haha vs. Noh Hong Chul' special on Infinity Challenge will be broadcast on January 21st.

Source: Haha's Twitter