Gaku Marunouchi

"Marunouchi Gaku has come back to Japan after being away for 10 years. He reunites with his childhood sweetheart, Tamano Kako. However, before they can date, Gaku must defeat Kako in a game of Takkoku..." as mentioned in the Synopsis. He doesn't know how to play at first, but as he challenges other students, he uses the skills he acquired from over seas to defeat his opponents. He later realizes he'll need more that to defeat the #1 Takkoku player in Japan.