On a rainy night, the Airbnb they had booked was unexpectedly double-booked. Unable to contact the management company, married woman Ren and office worker Tatsuya find themselves spending the night together as strangers. Through awkward conversation, they realize each other's loneliness, and under the same roof, they are drawn to one another, their hearts growing closer with each desire they share. As if to fill the loneliness of her husband working overseas, on a night filled with the sounds of rain and thunder, they give in to each other...