I was recently shocked when a recent user was unaware of kiriraitaa's seminal abuse work True Happiness (pool #440 / pool #251), which is the origin of the now-ubiquitous poo poo dance and might have been the first appearance of leaf diapers. His light abuse story Between Studies (pool #124) introduced visual staples like a yukkuri hurting itself trying to punish an electric cable and a yukkuri trying to heal its shredded accessory by licking it. He invented the House Yu subspecies (pool #604). I don't know if he invented shell marisa (pool #294) and wasa reimu, but his comics are where I first saw them. Similarly I don't know if Between Studies is the first time a yukkuri declared a pebble to be its "treasure", but it's the first time I saw it. Is there anyone who's memory goes far back enough to speak on this?
Updated by TakeItSlow