When a prototype automated worker robot named Auto has proven successful on the night shift at Alert Insulation, plans are put in motion to replace almost all the human employees with the next generation of robots -- but to Auto's dismay, he is also to be replaced by the new and improved robots -- something he refuses to accept, and takes murderous action to prevent.。窪の短編集「水やりはいつも深夜だけど」に収録されている「かそけきサンカヨウ」は、家庭環境のせいで早く大人にならざるを得なかった高校生・国木田陽の葛藤と成長を描く物語。。