Because the lame doctor said that the dragon's tail is similar to the tiger's bone and bear's paw, which is a big supplement and can gain the power of the dragon. Let Xiao Lin eat the dragon tail, which is good for his health and improves Xiao Lin's life.

Extended data:

Thor was unexpectedly rescued by Kobayashi, moved by Kobayashi, fell in love with Kobayashi (obsessed) and began to live in Kobayashi's house as a maid. The identity of the maid is what Xiao Lin doesn't want. In order to repay Xiao Lin, you can pay any price, even your own body.

Cute in appearance, but dragon in essence, so I will basically despise human beings, but I won't despise them when I get used to life in the future. But only Xiao Lin is special.