Year : 2011
Author : Koshi Tachibana (橘 公司, Tachibana Koshi)
Illustrator : Tsunako (つなこ)
Publisher : Fujimi Fantasia Bunko
Number of volumes : 2
Official Website : http://www.fujimishobo.co.jp/sp/201103date/
Plot Summary: (from back cover of vol. 1)
April 10th. Yesterday was the last day of spring vacation, so starting this morning it was a school day. After being woken up by his cute little sister, Itsuka Shidou believed that it would be the start of another normal day. As for the meeting with the girl who called herself a spirit......
Along with a sudden shockwave, the townscape vanished without a trace. In a corner of the street which had now become a crater, the girl was there.
"--You, have you come to kill me too?"
The disaster that will destroy humanity, a monster of unknown origin, and a being that is rejected by the world; the ways to stop this girl number two. Annihilation, and conversation. His little sister Kotori, wrapped in a military uniform, thus said to Shidou: "Since it's like this, just go date her, and make the spirit fall for you!" "Wh.. whaaaaaaaat!?" Enter a new age of boy meets girl!!
It was first released in March, and an anime adaptation is already in the works (http://myanimelist.net/forum/?topicid=365581, http://www.animenewsnetwork.com/news/20 ... -the-works)