I usually don't do anime stuff, but I think this turned out alright. Mostly focused on his school uniform, and not the hero uniform. ADetailer helps with the face a fair bit.
Example Prompt:
Positive: masterpiece, best quality, amazing quality, 1boy solo toned male sitting, smile, classroom desk, anime, anime coloring, <lora:Kirishima_Eijirou__My_Hero_Academia__Illustrious-000020:0.75> kirishima eijirou, spiked red hair, red eyes, sharp teeth, u.a. school uniform, grey jacket, white collared shirt, red tie, green pants
Negative: blush, embarrassed, female, shota, lowres, cropped, worst quality, low quality, JPEG artifacts, bad quality, worst quality, worst detail, sketch