The abbreviation of the pronunciation of Kageyama Tobio's name. According to the Fun Love Show Encyclopedia, we learned that Tobio Kageyama is a character in the Japanese manga "Volleyball Boy". The setter of the Karasuno High School volleyball club. kgym is the abbreviation of his name kageyamatobio. "Volleyball Boy!!" is a juvenile manga created by Japanese manga artist Haruichi Furudate. This work was serialized in Shueisha's magazine "Weekly Shonen Jump" from February 20, 2012 to July 13, 2020. Completed. The traditional Chinese version of this work is published by Dongli Publishing House. In mainland China, it is distributed by Fanfan Animation. The simplified Chinese physical version is published by Zhejiang People's Fine Arts Publishing House. The electronic version is published by Tencent Animation, Kuaikan Comics, Bilibili Comics, and Manga. Comics released.