You are going to Watch Ace of Diamond: Second Season Episode 20 English subbed online free episodes with HQ / high quality. Stream Anime Ace of Diamond: Second Season Episode 20 Online English sub With Heads Held High. Seido High School makes the round of eight, but Miyuki is overstressed by his role as the captain. “I thought that with you as the captain, the team will get better,” Yuki encourages him. To add to the problem, the ace of Oya High School knows Furuya is injured.