There is a man standing in front of a podium in a classroom

There was a man standing in front of a blackboard，There is a triangle on it, Teacher, great teacher onizuka, as a strict school teacher ), yukio - e, asian old skinny scientist, hiroaki tsutsumi style, standing in class, In the school classroom, YouTube video screenshots, genius, perfect geometry, inspired by Zhang Xiaogang

(deformed iris, deformed pupils, semi-realistic, cgi, 3d, render, sketch, cartoon, drawing, anime:1.4), text, close up, cropped, out of frame, worst quality, low quality, jpeg artifacts, ugly, duplicate, morbid, mutilated, extra fingers, mutated hands, poorly drawn hands, poorly drawn face, mutation, deformed, blurry, dehydrated, bad anatomy, bad proportions, extra limbs, cloned face, disfigured, gross proportions, malformed limbs, missing arms, missing legs, extra arms, extra legs, fused fingers, too many fingers, long neck