Death Bird 4444

1-4.
Panic World (パニックワールド)
Takashi Shiki is a ronin student who has nothing going for him. One day, he sees fighter planes flying above the sky - as well as a man who died from a gunshot to the head on the ground. The next day, after tanks start to show up, a mysterious young woman named Yuki Kitano begins to accompany Shiki. Shiki also is given the task of watching over his wealthy neighbor's mansion for a hefty sum. But this fortunate turn of events for Shiki is too good to be true: before long, the truth of the matter becomes clear to him - World War III is about to begin.

5. Yakou Toshi no Mirai (夜行都市のミライ)
Adachi resides in a city far from the sun - so far from it, there is no night or day. One day, a surprise encounter leads him to meeting Mirai, a young lady who not only lives in a place even further below Adachi's, but wishes to obtain a flower in the city of light above.

6. Death Bird 4444 (黒死鳥4444) [Written by Buronson under the pen name Shou Fumimura]
7. Kiiroi Usagi (黄色い兎)