A girl wiggles and strips on a beach, watched by a small naked boy with an erection. Things continue. For sanity's sake, let's pretend that he's merely an undersized adult. (Which clearly isn't the intention.)
RWBY (pronounced "Ruby") is an anime-influenced American CGI web series that got an anime spin-off (RWBY: Ice Queendom) in 2022. That show I quite enjoyed, but it spends way too many episodes inside Weiss's dream.
Magalenha is the song by Brazilian musician Carlinhos Brown.