They were high school classmates, spent their youth together in the school choir and certainly had similar dreams. But one rainy night 20 years later, Furusawa Mizue suddenly shows up at the home of popular scriptwriter Makabe Suzune, with her young son. She has lost her job, money and even the home she lived in. Claiming that Suzune is the only one she can turn to, Mizue beseeches Suzune to let her stay for one night. However, this quickly becomes a promise to stay until she gets employment. Unable to cruelly thrust mother and child away, Suzune’s daily life and work get disrupted. Then, a series of strange incidents start to happen to Suzune’s surroundings. Through this reunion of two classmates who have led completely different lives, all sorts of dormant feelings erupt and memories that they were starting to be forgotten are resurrected. ~~ Based on the novel "Haburashi" by Fumie Kondo.

동창 친구와 함께 살면서 벌어지는 여자들만의 기싸움을 그린 드라마

　　独自居住在一桩高档公寓中的真壁铃音是一名小有名气的电视剧编剧，她的作品备受好评，现实生活中又与制作人柳井抱持着相敬如宾的不伦关系，亦可为顺风顺水。谁知这一切在某个雨夜画上句号。这一晚铃音的高中同学古泽水绘拖着六岁的儿子不请自来，她和铃音曾在高中的合唱部待过，当下铃音所写的剧本正以高中这段经历为蓝本。作为关系并不亲密的二人，水绘的前来让铃音颇感错愕，但出于礼貌她还是将对方留在家中。本以为只是短暂借住，谁知不速之客却因各种理由留了下来，还让铃音本来平淡的生活乱作一团……

《牙刷／女友們》改編自近藤史惠懸疑小說，由內田有紀主演。故事講述人氣編劇鈴音（內田），和在故鄉靜岡女子商中合唱部共渡青春的同學水繪（池脇千鶴）再遇，展開共同生活後，她的生活和工作節奏都被打亂。