Shounen yo Ochichi o Shibore - Boys CHIKU-be Ambitious

A sports milking competition for high school boys!? Set in modern Japan, in a world where the God of creation came up with the idea: "Let's make milk come out of boys'', "competitive milking'' was the most popular sport. Above all, winning the Milk Crown Cup is considered the greatest honour for boys. The main character, Nakano Hagumu, together with his friend Nagaoka Maki, is recommended to enter a top school for milking. However, during the entrance exam, he is reunited with his childhood friend, Shigehara Taiki, who transferred from a rival school...? The competitive milking BL in which three childhood friends put their love and youth on the line is about to begin! [Translated from DLsite]