参考:Angel Beats!(エンジェルビーツ) 2010/05/04 http://yutori7.2ch.net/test/read.cgi/news4vip/1272947944/ http://yutori7.2ch.net/test/read.cgi/news4vip/1272960662/ http://yutori7.2ch.net/test/read.cgi/news4vip/1272985248/