There are three high schools: co-ed Narayama High, all-boy Kashimori High, and all-girl Sakuragawa. Due to decreasing enrollment and financial difficulties, the three schools must be merged. However, those in charge of the reorganization could not agree on which schools to close and which to keep open. They finally decide to let the students themselves determine which school will survive. Now all the students have the chance to protect their schools, but which one will be the last one standing? The student council of Narayama High, at least, don't want to give up on their school without a fight! (Source: MangaHelpers)

Seirin is the only outcast of an Elite Family. With great effort, He barely able to get into work as a tutor of a foreign princess for... the last princess of Shimuru main branch family. Mine is still an innocent 13 years old princess, a graceful lady── or maybe not. Doesn't like being selfish and rampaging super problematic child. While Seirin is having a headache, he kind of want Mine to be princess like. Also somehow, Princess Hime is being attached to Seirin as a teacher. But, The Empire who supposed to have signed a peace treaty with Shimuru has declared a war. It become a dilemma for Seirin, could it be a big step to become a Hero!? (Source: jCafe24)

Omnibus of stories by various light novel authors centered on "One Year War." 1. Ball Pilot 133-28 (BALL・PILOT 133-28) \[*Takami Kazuyuki×Ogata Kouji*\] 2. Desert 2 (DESERT2) \[*Hamazaki Tatsuya×Ogasawara Tomofumi*\] 3. Last Tears (LAST TEARS) \[*Goikeda Shinya×Kinoshita Tomotake*\] 4. Doukeshi-tachi no Yoru (道化師たちの夜) \[*Iwasa Mamoru×Konishi Hiroshi*\] 5. Tatta Futari no Senjou (たった二人の戦場) \[*Hayashi Jouji×Komatsu E-ji*\] 6. Yoru to Yoru no Aida (夜と夜の間) \[*Shouji Takashi×Yamada Hideki*\] 7. Gekkou no Yume Uchuu no Tamashii (月光の夢 宇宙の魂) \[*Miyamoto Kazuki×Nakakita Kouji*\] 8. Jaburo no Daichi ni (ジャブローの大地に) \[*Kanzaka Hajime×Shinma Daigo*\]

There are three high schools: co-ed Narayama High, all-boy Kashimori High, and all-girl Sakuragawa. Due to decreasing enrollment and financial difficulties, the three schools must be merged. However, those in charge of the reorganization could not agree on which schools to close and which to keep open. They finally decide to let the students themselves determine which school will survive. Now all the students have the chance to protect their schools, but which one will be the last one standing? The student council of Narayama High, at least, don't want to give up on their school without a fight! (Source: MangaHelpers)

It is based on the work "ピクニックは終末に" which Takami Kazuyuki submitted under the name of "Enokino Hidehiko" (榎野英彦) to the 6th Dengeki Game Novel Award and made it to the final selection. Each volume is an omnibus, with a different protagonist in each work. The story revolves around a boy and a girl who are guided by members of a mysterious organization called the Organization to visit parallel worlds, where they help to change those worlds from the brink of destruction to a better one.