The Key (2022)
Original title: 鍵
The Key is a 2022 Japanese-language drama movie directed by Hiroki Inoue, with a running time of 1h 15m. It stars Shingo Mizusawa, Yuki Mamiya and Atomu Mizuishi.
Kanda, an elderly teacher whose manhood is beginning to fade, loves his young wife Ikuko, but finds himself unable to satisfy her high libido - Until he discovers the world of spoiled cuckolds.