When the Rain Falls (2022)

Hazuki clips her nails every time it rains. She caressed 'her' with these fingers back then. Hazuki, an editor of a publishing company now, is attracted by Shiori, the head of planning. On a day when the two women soaked wet in the rain, they enter an motel for shelter and take a shower. There Hazuki sees the image of her lost "girlfriend" in Shiori and eventually they reach out to each other.

Unfortunately the movie When the Rain Falls is not yet available on HBO Max.