retro artstyle
おっさんホイホイ レトロ レトロポップ ニューレトロ retro
Art drawn in the style from a prior era of at least over a decade ago, whether it be art from the given era or art drawn after it (faux retro artstyle).
On Danbooru this includes styles from any of these decades:
Older styles may be considered fine art parodies.