From the girl who had surely commit suicide, came a death game. "On the other side of this door is the colosseum where you will kill each other" When the girl woke up, before her eyes was a space she had never seen before. Given a handgun and a knife, they were told to kill each other. A mercilessly planned game of death. Of the 30 people gathered, only 1 was allowed to remain--. When high schooler Hagiwara Yuuto picked up an app called 'Collesseum', he came to know the start of the death game 'Collesseum' as well as that central class figure who had surely commit suicide, Tsukishima Io, was participating. Knowing he can support her from outside the game, Yuuto, along with his classmates try to clear the game, however... the common point among all 30 participants, relays the terrible truth to Yuuto and co. (Source: Amazon)

A 33-volume collection of award-winning oneshots put out by Kodansha from 2002-2012. Some of these would later get serialized or collected in other volumes. **Serialized or otherwise collected:** AKABOSHI Tomo [Shishunki Syndrome](https://www.mangaupdates.com/series.html?id=10895992058) AKIZUKI Risu [Oku-sama Shinkaron](https://www.mangaupdates.com/series.html?id=8585) ARAI Hideki [8-gatsu no Hikari](https://www.mangaupdates.com/series.html?id=48516) ARAMAKI Keiko [GENOMES](https://www.mangaupdates.com/series.html?id=100366) ASADA Torao [Spoonman 3.18](https://www.mangaupdates.com/series.html?id=7155) ASHINANO Hitoshi [Yokohama Kaidashi Kikou](https://www.mangaupdates.com/series.html?id=586) Endo Hiroki [Kitto Kawaii Onnanoko Dakara](https://www.mangaupdates.com/series.html?id=5984) ENOMOTO Shunji [Golden Lucky](https://www.mangaupdates.com/series.html?id=44334) IGARASHI Daisuke [Obayashi ga Hikoeru Hi, Hoka (collected in Hanashippanashi](https://www.mangaupdates.com/series.html?id=2347) IRIE Kiwa [Haikibun! Sakanahime](https://www.mangaupdates.com/series.html?id=54246) IRIE Noriko [Neko no Te Kashimasu](https://www.mangaupdates.com/series.html?id=34406) KIMURA Kon [Koube Zaijuu](https://www.mangaupdates.com/series.html?id=6616) KITOH Mohiro [Vandemieru no Tsubasa](https://www.mangaupdates.com/series.html?id=2395) KOMAI Yu [Sonna Yatsua Inee!!](https://www.mangaupdates.com/series.html?id=16844) MATSUMOTO Taiyou [STRAIGHT](https://www.mangaupdates.com/series.html?id=9964) NIHEI Tsutomu [BLAME! (prototype chapter, included in NOiSE)](https://www.mangaupdates.com/series.html?id=2275) OHARA Shinji [Boku wa Otouto](https://www.mangaupdates.com/series.html?id=23188) SAMURA Hiroaki [Mugen no Juunin](https://www.mangaupdates.com/series.html?id=1628) SOUJI Hajime [Sanmon Mirai no Katei Houmon](https://www.mangaupdates.com/series.html?id=95297) TOUME Kei [Kurogane](https://www.mangaupdates.com/series.html?id=1034) TOYODA Minoru [Love Roma](https://www.mangaupdates.com/series.html?id=5227) TSUCHIDA Seiki [Miseinen](https://www.mangaupdates.com/series.html?id=65435) URUSHIBARA Yuki [Mushishi prototype chapter, collected in Filament](https://www.mangaupdates.com/series.html?id=35219) WAKANA Shouhei [Kamen Tenshi](https://www.mangaupdates.com/series.html?id=38659) **Other:** Hiramatsu Kannosuke [Yume](https://www.mangaupdates.com/series.html?id=134645) ABE Yoshitoshi [Ame no Furu Basho](https://www.mangaupdates.com/series.html?id=70439511114) Eshikawa is a man who has lost sight of his life and stumbles through it, with no clear meaning or purpose. One day, he is informed that his ex-girlfriend committed suicide, which sets his brain on retrospect mode. He goes on a journey of self-revelation and contemplates upon the myriad of human emotions, the joys and sorrows of normalcy. YAMAZAKI Ren [Like a Laika](https://www.mangaupdates.com/series.html?id=15464858831) From Atelier du Noir Scans: The daily, average life and interactions of some of a ship’s crew as they depart to explore space. Winner of the Jiro Tanaguchi Special Award for manga in the 2010 Four Seasons Award Anthology. NADEGATA Nazuna [Kokenoshima](https://www.mangaupdates.com/series.html?id=25320595156) From Atelier du Noir Scans: On a remote island, a skilled swordsman who honed his craft on the local population attempts to atone for his sins and lift a curse by hunting and killing demons. Winner of the Hagio Moto Special Award for manga. KIBA Kouichi [Jagua](https://www.mangaupdates.com/series.html?id=26870403448) As the protagonist is returning home one night, she runs into a man who had just been in a car crash. As he is dying, he asks her to throw a certain package into the sea. JOUYAMA Yui [Zanuff the Butcher](https://www.mangaupdates.com/series.html?id=57841268625) A butcher with a dark secret finds a little girl. HAYASHIDA Q [Sofa-chan](https://www.mangaupdates.com/series.html?id=9150331372) Tells the story of a female ghost who lives on a couch and it's the debut work of Q Hayashida as mangaka. KANOU Rie [Kingdom of Stars](https://www.mangaupdates.com/series.html?id=20282565791) Oneshot about love, religion, and a big misunderstanding that leads to a weird situation...

I became the sister of the villain, who shed no blood or tears in a war-ridden novel! I thought I was born again as the youngest daughter of a noble family, but I'm the little sister of a villain who's only being used! A baby's body too fragile to survive in the Lagrange household, a brutal family that makes children fight for successors... I've decided to stick to the villain in order to live! I need you to be my guardian until I run away from here. Raise me, villain!