Takkoku!!!

Sinopsis

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. The problem is though, Kako is the #1 Takkoku player in Japan and she doesn't know how to go easy.