Playing Soccer with You is Super Fun, You Idiot

S1 E3: It’s the first day of the joint training camp. During dinner, Tsukushi overhears the students from other schools talk about Kazama's middle school days. Curious about what happened in the past; Tsukushi tries his best to ask his roommate, but can't quite do it. When Tsukushi wakes up the next morning, Kazama's missing; apparently he went to train by himself on the pitch.