Tail.

After one whole day of peace, it was unavoidable that things would have to get messed again.
While WooPil was out with Chan for some "mysterious" business, LeYang thought well to cut off the big fox tail of the plushie WooPil got himself at the toy store and… wear it in his pants, so that he thinks he will be like WooPil and thus his brother won't have to be shy anymore.

As imaginable, though, his ungrateful fox brother didn't show any appreciation to his gesture. Instead, he literally fainted when he saw the tailless remains of his plush in Zhongli's bedroom.

Chan rushes WooPil to his own residence and summons Lani there, to check on the child.
The doctor visits WooPil and determines that he simply passed out because of shock and that there won't be any serious consequences.

After Lani left, Chan leaves WooPil to rest in his residence and hurries to go to Earth to see if he can buy another of the same plush, to replace the broken one. He is really annoyed, despite understanding that LeYang didn't do it for a bad reason.
Of course, though, the fox plush was the one and only the store had left and Chan didn't even manage to find a way to have a copy delivered. It's as if that one plush was the last left in the world.

When he comes back, he is even more bitter. But he is soon warned that there is someone who wants to meet him in the square of the city, so he has to go there.
When he arrives, he finds himself in front of the King of Arcanis, the father of DaNa, who just wanted to exchange some words with him, since he and Chen are the only members of Shige's family left.