Dragon Head

Teru Aoki is returning with his classmates from a school trip when he sees a weird beam of light in the distance. The train passes into a tunnel just before an earthquake hits. Teru manages to survive, but everyone else in his car is killed. When he escapes the car to explore, he finds two other survivors -- Ako Seto, an unconscious girl, and Nobuo Takahashi, who is rapidly degenerating into insanity and claiming that he sees 'something' in the darkness in the tunnel. Both ends of the tunnel are also blocked, and the whole thing is getting steadily hotter for no apparent reason.

Thus begins this horror manga by Minetaro Mochizuki.

As the story continues, Teru and Ako have to deal with Nobuo and escape the tunnel into the outer world... which they find is almost completely destroyed by some mysterious cataclysm. Cities are abandoned, there's no edible food or drink, and the sky is obscured by a thick cloud of ash which makes navigation and travel nearly impossible. The two run into a few other survivors, including a teenage cult, deserting soldiers (who note that the military is completely unable to cope with the disaster), and the Dragon Heads -- people with scars on their heads, who seem to be completely unable to feel any fear, even given the disastrous surroundings. Teru and Ako only want to return to Tokyo to find their families, and maybe figure out what happened, but the route to Tokyo is a long and torturous one, and the survivors they meet along the way aren't necessarily any more stable than Nobuo.

The series is largely a meditation on the nature of fear and the proper way to react to it. Nobuo and the cultists react by completely surrendering to their fear, which results in disaster. The surviving inhabitants of Izu peninsula, on the other hand,, and Tokyo. Teru tries to feel fear without giving into it, but given the circumstances, is that even possible?

Tropes:

 * Alien Sky: The thick cloud of ash makes navigation nearly impossible, and screws up Iwada's helicopter when it clogs the engines.
 * America Saves the Day: Averted. We find out at the end from the television station that they can't contact any heads of any government. Nimura also says, at one point, that if America could save the day, they would have, so their lack of presence indicates that they're screwed too.
 * An Aesop: It's disastrous to let your fear rule you, and just as bad to block fear out entirely. Learn to feel fear without letting it control your life.
 * Apocalypse How: Somewhere between class 0 and class 5; as there's no reliable sources of information, neither the characters nor the reader ever find out for sure. We never even find out what caused the disaster. Nimura theorizes that, but Iwada points out that they really have no idea.
 * Attempted Rape: Nimura's intention on landing in Sakurayama is to find fuel, weapons, and women. Yamazaki tries to rape Ako, but she manages to beat him up and escape.
 * Ax Crazy: Nobuo. The few Izu survivors who gave into their fear rather than shutting themselves off from it also qualify. Lastly,.
 * Bittersweet Ending:
 * Bottomless Pits:.
 * Brick Joke: The Dragon Heads aren't even introduced until about halfway through the series.
 * Corporal Punishment: How Nimura works out his anger at having to go into the Izu town while Iwada fixes the helicopter.
 * Crapsack World
 * Dark Is Evil: Nobuo's descent into madness is often described as him 'giving in to the darkness.' Also, the thick cloud of ash, and the.
 * Dangerous Deserter: Nimura and his crew flee to Sakurayama, where Nimura wants to find women to rape.
 * Driven to Suicide: Most of the Izu survivors.
 * Drugs Are Bad:
 * Dying Alone: Flatly defied, even in the final chapter title: "I Don't Want To Be Alone When The World Ends". Teru and Ako are much happier to be together as everything continues to collapse.
 * Emergency Broadcast
 * The End of the World As We Know It: No food, no drink, and constant environmental disasters. As one character puts it, "Humanity is finished."
 * The Engineer: Iwada ends up as this, as he's the only one who knows how to fix the helicopter.
 * Face Death With Dignity: Teru, who thinks that he's almost certain to die whatever he does, yet continues on regardless. Subverted by Nimura, who calmly lies down and waits for the world to finish falling apart... only to become terrified again as Tokyo gets its shiny new volcano.
 * Face Heel Turn: Teru, temporarily, when he gives in to fear.
 * The Faceless: The faces of the news broadcasters are blurred out because of the terrible reception.
 * Fingore: How Ako deals with Yamazaki.
 * Five-Man Band:
 * The Hero: Teru
 * The Lancer and The Big Guy: Nimura
 * The Smart Guy: Iwada
 * The Chick: Ako
 * Ghost Town: Sakurayama. Unfortunately, not.
 * Heel Face Revolving Door: Nimura. He starts off a rapist, seems to be getting more moral during the Izu arc, and then falls again when he makes it to Tokyo.
 * I Love Nuclear Power: It's hypothesized that nuclear bombs may have caused the devastation, although characters note that it's unlikely that nukes could have destroyed everything all by themselves..
 * It Has Been an Honor: As Tokyo completely falls apart, and their survival becomes even more in doubt, Teru and Ako agree that they're really glad to be together.
 * Kaiju Defense Force: Of no help whatsoever.
 * Karmic Death:.
 * Karma Houdini:.
 * Kent Brockman News: Teru and Ako catch an emergency broadcast, which features one announcer breaking down into hysterics and ranting that nowhere is safe and everyone is doomed.
 * Averted in the end, when the television station reads the Document, which provides more description of what actually happened and is happening than any other point in the story.
 * Law of Conservation of Detail: Only the three initial main characters get full names. The supporting characters get a first name. Most of the others, including virtually all of the insane people, only get nicknames.
 * Lethal Lava Land:.
 * Mad Science:  seems positively gleeful about the end of the world.
 * The Mentor: The Lady, possibly the only sane person the characters encounter after arriving in Izu.
 * Mildly Military: Given the circumstances, Iwada's palpable contempt for his commanding officer is perhaps understandable.
 * The Medic: The Lady.
 * The Movie: Was made into a live-action movie. Notable differences included.
 * The Mutiny: Nimura decides that the military situation is untenable, and orders his helicopter to desert..
 * Nietzsche Wannabe: Nimura. Seems to die down somewhat while the group is in Izu, but once they return to Tokyo, it kicks back in.
 * No Ending: What caused the destruction? What is the significance of the Dragon Heads? Did any of the characters survive and rebuild? No one will ever know.
 * No Name Given: Teru, Ako, and Nobuo are the only characters who get full names. The soldiers get one name each, as do Teru's classmates and one character who introduces the Dragon Heads. Everyone else is known by nicknames or descriptors (The Lady, The Cop, Bandage-Man, The Researcher, the Dragon Heads).
 * No One Gets Left Behind: Averted. Iwada has no problem leaving Nimura behind, until Ako puts a gun to his head. When
 * Nothing Is Scarier: when the group arrives at  Mount Fuji, they begin to descend..
 * One-Man Army: Iwada, while Nimura and Ako are in the Izu town and Teru is convalescing.
 * Pater Familicide: The Izu survivors do this for the whole town.
 * Redshirt Army: The helicopter fleet that Teru and Ako see.
 * Scenery Gorn
 * Science Is Bad: Played With. While scientific advances are the only way that humans can even go on living -- all that remains is processed and bottled food and water, and helicopter is the only way to travel large distances -- the Researcher also says that science tried to eliminate fear, with disastrous results.
 * Self Harm: How the survivors in  act so they can try to feel something. They try so hard that most of them have slings, crutches, eyepatches, etc. It doesn't work.
 * Shut Up, Kirk: Teru lectures Nimura on how, while he's afraid, his urge to find out what happened to his family keeps him going.
 * Sidequest: Upon arriving in Izu, Teru collapses due to an infection, necessitating a two-volume detour into a city full of insane, suicidal people in order to find medicine.
 * Sociopathic Soldier: Nimura.
 * Tactical Withdrawal: Both in Sakurayama and the cliff, the only sane option is to retreat.
 * The Squad: Nimura, Iwada, Ooiki, and Yamazaki.
 * Trend Aesop: Nimura notes that the apocalypse made it remarkably less relevant who ha the best jewelry, car, or job.
 * Walking Armory: Iwada hides a bazooka in the helicopter; he stole it from the base before the squadron left. It comes in handy in Izu.
 * We Interrupt This Program: Averted, by the time Teru and Ako reach the surface, nothing is broadcasting to be interrupted by the emergency bulletin.
 * Worthless Yellow Rocks: At the shopping mall, Iwada notes that it's freezing and they have no fuel to start a fire, since the various disasters have destroyed almost everything. Nimura gives him some thick sheafs of bills, pointing out that this is all they're good for.
 * Would Not Shoot a Civilian: Averted hard.
 * Zerg Rush: How the Researcher's minions deal with the scout teams.