Matantei Loki Ragnarok EP9 - Ninth Night - Mayura's Way to Certain Victory in the Ceremonial Test!?

On his way back home, Frey accidentally drops a red jewel in a park. The jewel grows into a tree, and the rumor spreads that this tree grants wishes if you pluck a leaf. Meanwhile, Mayura and Narugami learn that if they fail their next tests, then they will be required to take summer classes. Both come across the tree and take a leaf. When Mayura shows her leaf to Loki, he destroys it and forbids her to go to the park. That night, Loki and Yamino dispel the tree, changing it back to a jewel that Mayura picks up. Later, Narugami visits Loki's house as part of another part-time job and shows Loki his leaf, making Loki realize the tree is still alive.