Dentist

"Right. Tell me about your plans!"

"Yes, but first, I'm curious," Eun Ha still had a question to ask. "Did Professor recover on his own, or did any external factors interfere? I mean ... Yesterday you were really bad. This is important."

"Do you remember being sick all your life?"

"I don't know. I think I must have had a stomachache or something ..."

"Yes, maybe that. But we are very resistant. If we have a 'full battery', it is almost impossible to get hurt or die. It turns out that I don't have a full battery, as you can see," Shin admitted. "Could you…" the older fairy gestured the sheets which he was wrapped on. But Eun Ha knew that as soon as he had some clothes on, he'd remember urgent things to do. 

"OH! So could we be virtually immortal?"

"No, Jung. The oldest fairy that ever lived was 600 years old. That's our limit, it seems. I think I already told you that."

"WOW! This is too much! And what kills us?"