Duelists With the Rune Eyes

Yusei's landlord, Zora, is depressed because the city wants to replace the broken cuckoo clock on her clock repair shop. Later, the gang are visited by Zora's son, Lynden, who has returned after three years of training to fix the clock. When he goes to see Zora again, she is not happy to see him, since he was the one who broke the clock in the first place.

Synopsis excerpt via Kitsu.