在北京工作的台湾动画设计师陆飞（陈柏霖 饰）平静的宅生活被一名醉酒女孩冉静（王珞丹 饰）打破，从一次两人都很被动的借宿事件开始，空姐冉静似乎对这位抱持“不恋爱主义”的木讷大男孩产生了兴趣，几次接触后，冉静带着大包小卷以及数不清的“共同居住”规则分享了陆飞的居所，陆飞自在的单身状态宣告终止，心有不甘之余却又渐渐适应了在冉静的督促照顾下生活工作，后者的到来，更使陆飞因久无灵感而搁浅的动画创作出现了转机。陆飞还未来得及细细体味爱情的甜蜜，一场变故迫使他做出改变两人生命轨迹的抉择……本片根据网络小说《和空姐同居的日子》改编。

どうしようもない人生でも生きていかなくちゃいけないデリヘル嬢たちの姿を描く。山田佳奈監督自身の同名舞台初の映画化にして、長編デビュー作。主人公カノウ役を伊藤沙莉が務める。

Chan-woo, who has been studying to become a police officer for 5 years, joins his friends for dinner to ask for the money to apply for his exam and ends up getting drunk. He completely blacks out and wakes up not remembering what happened in his next door neighbor's room. Not only that, he finds a bloody corpse in the middle of the room. He hurries back to his room and tries to report the incident but he had forgotten his phone in the other room. But the door is locked and he has to resort to using a rope to swing to the next door room outside the window. Once the phone is recovered, he cannot go back because of a group of cultists who are evangelizing the neighbors in the hallway. He knows it’s the last day to apply for his exam and gets antsy as time is running out.

以一名少年的成长物语为主线，聚焦现今日本社会的孤独。