Kyō no Go no NiKyō no Go no Ni.

Kyō no Go no Ni (今日の5の2, Kyō no Go no Ni; "Today, in Class 5-2") is a Japanese seinen manga series created by Koharu Sakuraba, the author of Minami-ke. It was originally serialized in Kodansha's Bessatsu Young Magazine from 2002 to 2003, and the twenty-two chapters were later collected together in a single tankōbon volume along with two extra chapters and published on November 11, 2003, by Kodansha. The main premise of Kyō no Go no Ni is the school life of the fifth year class 5-2 (age 11 to 12), focusing on an elementary-school boy named Ryōta Satō.