Hi. Can someone tell me pls how to make similar animation to this using ai

[Toshiro638]

HELLO. I just want to create myself a hentai game in rpgm mv format. And I want to add good animated sex scenes to my game, but I don't know what tools or programs I should use and how to use them. I already search on Google, but there is no information there.
But I found this animation and want to make similar ones. I would appreciate any help or guidance.

 

[witcher234]

Its either done using spine and creating animations. or using a ref video and touching up using AI