Give my spell book back!

Jisung was at his grandmother's house, he went to visit because it was the weekend and he was trying a new spell at his grandmother's insistence. He was dealing with a spell that was very difficult and needed to be focused. His grandmother hit his hand with the magic stick at the slightest mistake

"Focus, Jisung"

Although his grandmother was a sweet woman, she was too disciplined when it came to magic. Realizing that he couldn't focus anymore, Jisung went into the garden to take a break. Just as he was about to take a deep breath, he was startled by a bat landing on his shoulder. It was his childhood friend. It seems very strange that a vampire and a witch are friends, right? In fact, their mothers were friends and they had to become friends in a way. It couldn't be said that they loved each other very much, but they loved to annoy each other. Jisung shook the bat off his shoulder and muttered

"What are you doing here?"