Episode 1

'''Case. 01 Adrift' (漂流, Hyōryū'') is the first episode of the Are You Lost? Anime Adaptation.

Summary
After miraculously surviving a plane crash, four high school girls, Homare Onishima, Asuka Suzumori, Mutsu Amatani, and Shion Kujo, head towards a remote island for safety. Using the survival skills she picked up from her father, Homare helps Mutsu tackle dehydration by feeding her a locust with her mouth.

Survival Lessons
Joichi Onishima: Homare:
 * When you face you opponent, make sure to stand ready with your blade hidden.
 * You should never eat slugs raw - it's a true, Snails hold a lot of parasites.
 * Moose testicles are a rare and valuable cut of meat that can be eaten raw. But don't except much in regard to flavor.
 * You can't drink seawater, because there's salt in it. You'll lose more moisture than you take in. Let's say that a person needs two liters of water of day. If you lose two percent of that, you get thirsty. At three percent, signs of dehydration start. At five percent, you get headaches and dizziness. At ten percent, organ function decreases. Leading to death.
 * Sharks have special receptors in their noses, the ampullae of Lorenzini, that can sense electricity

There are five ways to obtain drinking water:
 * 1) to take it from plants or animals. You can get water from coconuts and cut banana trunks. You can get also water by cutting the bamboo and vines.
 * 2) purify undrikable water.
 * 3) Distil seawater
 * 4) Rain water
 * 5) doesn't appear in the episode. just mentions looking for water.

homare also advices Mutsu Amatani that collect your spit in your mouth and breathe through your nose. The question of whether we should share, as like do homare it is also doubtful. Caries is the most common disease transmitted in this way.

Questionable
at some point in the movie, homare ask Shion Kujo how thirsty is. She answers that he is dying of thirst, so homare give her own urine. She ensures when it's fresh, it's sterile. It's a very questionable method survival and experts are divided.

based on doi:10.1159/000013436 article, Symptoms reported during the first 2–3 days of the oral intake of urine include nausea, vomiting, headache, palpitations, diarrhea or fever. It has been argued that a high amount of urea may cause gastric ulcers.

Other research can confirm why it can cause stomach ulcers and confirm that there could be introduction of multiple antibiotic resistant bacterial pathogens through regular consumption of cow and human urine.