Its quite hypnotic btw that picture has name "hand_shakers_boobs.gif" .. pretty easy to find from where it is
I remember @Lovely making a tutorial on how to find them.Wait https://forum.novelupdates.com/threads/how-to-find-animes-from-gifs-or-images.56894/
nah i was too lazy to and who am i to deprive nuffians of a free chance to rejoice in bouncing large oppai while farming nuffies.