Identify trying to remember old hentai cartoon again

[Dadanetda]

Hello, I've been trying to find and remember an old hentai that I saw somewhere 4-6 years ago for a long time, to the point, I definitely remember there was an episode on the train, the basis of the concept is that small-sized fairies were pleasuring and in general they raped people, I don’t remember exactly whether they were invisible to others or not, but I know for sure that most people had such fairies
Briefly: the little fairies "raped" all the people on the train
Thanks