2017年电影《散步的侵略者》的番外篇连动日剧，由夏帆，染谷将太，东出昌大出演。

In a near future where allergies have become an epidemic, music producer Haru half-heartedly dates post office clerk and mail thief Michi. He searches for violent ways to reactivate his life, she dreams of escaping abroad; both volunteer to test a new drug which may provide a cure.

A young boy takes interest in piano while his family begins to disintegrate around him after his father loses his job.

流水潺潺的神田川，静静穿过东京的中心。河的两边皆是老旧狭窄的公寓，人生悲喜剧在此间交替上演，从未停歇。
明子（麻生うさぎ 饰）住在河边，生活单调而乏味，唯一的乐趣就是在天文望远镜里寻找水星。某晚，同样住在河边的朋友雅美（美野真琴 饰）发现河对面的公寓正上演着令人难以置信的一幕。复读生（岸野萌圆 饰）和他风姿绰约的母亲（沢木美伊子 饰）竟然放肆地纠缠在一起。于是她打电话告诉了明子，二人决定将复读生救出这个不伦的地狱……

Two friends who work together at a Tokyo laundry are increasingly alienated from everyday life. They become fascinated with a deadly jellyfish.