2boys, amputee, barefoot, black hair, black pants, blonde hair, collared shirt, dated, english text, erwin smith, eyokiki, hand on another's leg, happy birthday, holding, holding knife, knife, levi (shingeki no kyojin), long sleeves, looking at another, male focus, multiple boys, on chair, pants, shaving, shingeki no kyojin, shirt, sitting, white pants, white shirt, yaoi