From Manga Art: Kojima has a crush on a boy, but doesn't dare tell him. When Kojima thought, "If only there were just the two of us left in this world, I could confess," the god Jinmen shows up and grants her wish by lending her the time trap clock! With this, she can freeze the world, leaving just her and her crush...

A a variety of oneshot stories related to the supposed end of the world in 2012.

5) Nature-0 by HEE-JUNG Baek
Resource depletion, environmental contamination, desertification, and foolish wars. Mankind willingly walked along the path of annihilation. And at the end of that path, those who survived relied on the power of science and conducted endless experiments to obtain the valuable source of life. As scientists are exploring the desert's fallout areas, a child-like being is found naked on the ground and was brought into an underground survival refuge. As they analyze the child, what will they discover?

8) Myum-Myum by currygom
The world is in an uproar over the discovery of a stone tablet thought to have been created 500 years ago.
The stone contains predictions of major incidents that happened worldwide in the last 500 years. All of its prophecies had already come true. There is only one prophecy recorded on the stone that pertains to the future ahead: that the world will end in a year?s time, and only those who believe in the god drawn on the stone will find salvation.
The name of this god is... Myum-Myum.

13) If the World Ends, That's Cool! by Rangto
Friday the 24th, August 2012.
The world will end due to a meteorite crash... tomorrow. But people are fine with it. No one is screaming. No one is praying. Because they are all... cool.

In the year of 2013, the tide of zombies outbreak exploded in everyone homeland, humanity launches a large-scale battle in the endless nights awaiting for the arrival of the dawn.
The end is approaching, is there going to be a way out for them?
Their faiths were shattered into pieces and buried in ashes in the raging fire.
But within the blazing fire, a newborn hope arise once again.

Collective Comic Essays on the Universe and Beyond.

Humanity, having faced extinction at the end of the 20th century, would not have entered the new millennium if it weren't for them. In 1969, during their youth, they created a symbol. In 1997, as the coming disaster slowly starts to unfold, that symbol returns. This is the story of a group of boys who try to save the world.

Won the Kodansha Manga Award in the category "Best General Manga" in 2001.
Won the Seiun Award for Best Comic in 2008.

N/A

Picking up directly after the events of 20th Century Boys, it seems like the world is finally out of danger, but the mystery of "Friend" still exists. As the world is threatened again, Kenji must search his memories for any clue about "Friend."

Note: 20th Century Boys and 21st Century Boys' combined storyline won the Grand Prize at the 37th Japan Cartoonist Awards on May 9, 2008.

Based on the idol group, 22/7 (nanabun no nijyuuni).

From Dragon Voice Project:

About a robot, Jack, who appears frequently in Shimizu's SF stories. He's a robot with very human-like psyche and he once believed that he was human and he can even consume food, unlike many of the other robots of those times. However, a cruel incident opened his eyes to the truth and he decided to perform bounty-hunting duties on a strange planet. That's where he meets Ruby, who turns into an innocent-looking youngster and a beautiful and seducing woman at night... she's a Photuris - a human tribe that preys on other humans in order to survive...

From Condensation:
"In this world, is there really such a thing as an awesome guy?"

Midori just started high school and isn't interested in guys. She thinks they're all like her brother, Takeshi, who is rude and spoiled. Her way of thinking changes when a classmate of hers is pulled into the street dancing team led by Takeshi and his best friend, Sutou.

At first glance Higa may seem like a plain and quiet guy--but when the music starts flowing and his body starts moving--he transforms into a completely different person... Even Midori can't keep her eyes off him.

Two months after coming to Tokyo, Iku is enjoying otaku life, but something mysterious is happening to him: He's started to see ghosts!

One particular ghost - who's always standing on top of the pedestrian bridge at night - catches his interest, but he studiously ignores it... Until one day the guy turns up at his apartment holding a doujin Iku had dropped. He says his name is Seo Mimori, and seeing as he's a lost soul with nowhere to go, Iku doesn't really resist when he "moves in."

But then a shocking secret about Mimori's death is revealed...

Sequel to 23:45, the series continues after Mimori's ghost has returned to his body. Iku summoned up the courage to confess his feelings for Mimori, and even made an attempt to tell him everything that had happened which Mimori has no memories of.

From Nagareboshi Manga:

Nanaka loves to paint. So when she enters high school, she gets excited at the prospect of joining the arts club. However, there are only two members--the mysterious Chihaya and the energetic Kento. They're both good-looking guys, and Chihaya shares Nanaka's love for painting! Alongside the two gorgeous guys (and Nanaka's best friend)... what will happen?

From Shinmakoku Scanlations:

1-2) 24 Jikan Eikyou-chuu
Nakamichi works in the 24-hour convenience store on Sano's way home from school. Nakamichi is baffled by the amount of lollipops Sano buys everyday! But he gets very used to seeing Sano around, that when suddenly Sano stops showing his face at the store, he misses him! What happened to Sano? And why buy so many lollipops?

3-5) 24 Jikan Renai-chuu
Yoshino, an ordinary guy works at a convenience store where he meets the beautiful Yagami-san. He overhears Yagami-san having an argument over the phone with who he assumes is his girlfriend. What will Yoshino do when he sees Yagami drunk and collapsed outside the convenience store, and hears him whisper a guy's name in his sleep?

6-8) Extra: 24 Jikan Eikyou-chuu

1-2) Can't Kiss for 24 Hours
A math teacher who has an intense relationship with the problem student, Kikusui Kiyoya. Even though they were a couple in love, one day, Sensei suddenly wants to break up...?

3) If I Didn't Have You
Fujisawa Yuu just moved to a new town. On the first day of school he's warned to stay away from Nanatsuki Haruki. The word around school is that Nanatsuki who is actually 20 years old will sleep with anyone, but only at school. The mystery is why he only sleeps with people at school and why hasn't he graduated yet?

From Shoujo Crusade:

Miki always gets turned down so she frequently seeks consultation in love from the convenience store's shop assistance Azuma. Will that be all their relationship ever be?

From Lililicious:

In "24, 25," the main character reminisces about a girl she knew in high school.

7 years ago a strange disaster occurred in the 24th ward when laws of reality were distorted in that area. Our main character is a high school boy who lost his little brother. Can Hanako-san from his school help him find his sibling again?

But more importantly who is this Hanako-san of the 24th ward?