Model I used: 
<NOVA FURRY XL - IL V15.5> 


          
Prompts: Cel Shaded Art, anime artwork concept art cinematic photo breathtaking concept art horror-themed gothic style photorealism, photorealistic, detailed fur, masterpiece, best quality, amazing quality, very aesthetic, absurdres, newest, detailed background, countershading, Countershade skin, Scattered surface, detailed lighting, detailed shading, (side view:0.1), 4k render, masterpiece, best quality, best drawing, smooth lines, high budget, digital media (artwork), cartoon, vector art, Sketch, traditional art (marker), illustration, masterpiece, master work, best quality, ultra detailed, perfect anatomy, sharp focus, high-resolution, dynamic shading, illustrative style, cinematic lighting, smooth lineart, clean linework, rich textures, beautiful composition, depth of field, crisply rendered fur, expressive pose, professional artwork, finely detailed eyes, soft lighting, photo-realistic elements, intricate details, masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, newest, bedroom, soft light, table, (medicine on table:1.1) bed

duo, (little anthro fox:1.1), (male:1.6), orange fur, young, very short, (short black hair:1.6), (fluffy thick hair:1.3),(detailed canine teeth:1.3), detailed black eyebrows, bushy orange tail, tail with white tip, ears brown, green eyes, (purple hoodie), brown hands, (five fingers:1.3), paw with five fingers, black claws, (laying in bed:1.5), thermometer in mouth, (looking sick:1.4), white towel on head, towel folded, laying on back, (looking to the side:1.5), under sheets, hand on stomach,

(<lora:StS_Age_Slider_Illustrious_v1:-2.7>:1.3)
<lora:StS-Illustrious-Detail-Slider-v1.0:4>

BREAK, duo, silhouette, (kneeling:1.4), giving head pat, full body view, next to bed,
Negative prompt: worst quality, lowres, low quality, bad quality, bad male anatomy, (female, girl:1.9), bad female anatomy, bad explicit, poorly drawn face, bad face, bad facial expression, ugly, bad hands, morbid, deformed, disfigured, mutilated, malformed, missing body part, malformed hands, bad feet, fused legs, broken legs, bad body proportions, gross proportions, disappearing hands, fused hands, fused body part, fused legs, (fused digits, missing digit, extra digit), bad artist, bad background, cropped, watermark, username, signature, not in perspective, error, jpeg artifacts, squares, blurry image, not in perspective, plain pose, plain figure, old, oldest,, (human ears, human), claws, long hair, girl hair, pony hair, visible penis, blush on snout, green hair, muscular, bodybuilder, muscles, (old:1.9), (adult:1.9), (teen:1.9)
Steps: 40, Sampler: Euler_Max, Schedule type: Automatic, CFG scale: 5.5, Seed: 2717081127, Size: 1600x900, Model hash: 76abbfd047, Model: novaFurryXL_ilV160, Clip skip: 2, Lora hashes: "StS_Age_Slider_Illustrious_v1: bb11fa34470b, StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

+[UPSCALING]

Detail Inpaint - 

Cel Shaded Art, anime artwork concept art cinematic photo breathtaking concept art horror-themed gothic style photorealism, photorealistic, detailed fur, masterpiece, best quality, amazing quality, very aesthetic, absurdres, newest, detailed background, countershading, Countershade skin, Scattered surface, detailed lighting, detailed shading, (side view:0.1), 4k render, masterpiece, best quality, best drawing, smooth lines, high budget, digital media (artwork), cartoon, vector art, Sketch, traditional art (marker), illustration, masterpiece, master work, best quality, ultra detailed, perfect anatomy, sharp focus, high-resolution, dynamic shading, illustrative style, cinematic lighting, smooth lineart, clean linework, rich textures, beautiful composition, depth of field, crisply rendered fur, expressive pose, professional artwork, finely detailed eyes, soft lighting, photo-realistic elements, intricate details, masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, newest,

Negative prompt: worst quality, lowres, low quality, bad quality, bad male anatomy, (female, girl:1.9), bad female anatomy, bad explicit, poorly drawn face, bad face, bad facial expression, ugly, bad hands, morbid, deformed, disfigured, mutilated, malformed, missing body part, malformed hands, bad feet, fused legs, broken legs, bad body proportions, gross proportions, disappearing hands, fused hands, fused body part, fused legs, (fused digits, missing digit, extra digit), bad artist, bad background, cropped, watermark, username, signature, not in perspective, error, jpeg artifacts, squares, blurry image, not in perspective, plain pose, plain figure, old, oldest,, (human ears, human), claws, long hair, girl hair, pony hair, visible penis, blush on snout, green hair, muscular, bodybuilder, muscles, (old:1.9), (adult:1.9), (teen:1.9)
Steps: 50, Sampler: Euler_Max, Schedule type: Automatic, CFG scale: 5, Seed: 2210686806, Size: 3200x1792, Model hash: 76abbfd047, Model: novaFurryXL_ilV160, Denoising strength: 0.29, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 36, Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

img2img: 
parameters

Cel Shaded Art, anime artwork concept art cinematic photo breathtaking concept art horror-themed gothic style photorealism, photorealistic, detailed fur, masterpiece, best quality, amazing quality, very aesthetic, absurdres, newest, detailed background, countershading, Countershade skin, Scattered surface, detailed lighting, detailed shading, (side view:0.1), 4k render, masterpiece, best quality, best drawing, smooth lines, high budget, digital media (artwork), cartoon, vector art, Sketch, traditional art (marker), illustration, masterpiece, master work, best quality, ultra detailed, perfect anatomy, sharp focus, high-resolution, dynamic shading, illustrative style, cinematic lighting, smooth lineart, clean linework, rich textures, beautiful composition, depth of field, crisply rendered fur, expressive pose, professional artwork, finely detailed eyes, soft lighting, photo-realistic elements, intricate details, masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, newest, bedroom, soft light, table, (medicine on table:1.1) bed

BREAK, (kneeling:1.4), giving head pat, full body view, next to bed, full body view, portrait, (male, young), furry, anthro, little anthro pomsky, (male:1.6), (Grey and white fur:1.6), (short black hair:1.6), (fluffy thick hair:1.3), (dark gray ears:1.1), (detailed canine teeth:1.3), detailed fangs, detailed thin black eyebrows, Heterochromia, blue and green eyes, pink hair,
<lora:StS_Age_Slider_Illustrious_v1:-1.7>,

Negative prompt: worst quality, lowres, low quality, bad quality, bad male anatomy, (female, girl:1.9), bad female anatomy, bad explicit, poorly drawn face, bad face, bad facial expression, ugly, bad hands, morbid, deformed, disfigured, mutilated, malformed, missing body part, malformed hands, bad feet, fused legs, broken legs, bad body proportions, gross proportions, disappearing hands, fused hands, fused body part, fused legs, (fused digits, missing digit, extra digit), bad artist, bad background, cropped, watermark, username, signature, not in perspective, error, jpeg artifacts, squares, blurry image, not in perspective, plain pose, plain figure, old, oldest,, (human ears, human), claws, long hair, girl hair, pony hair, visible penis, blush on snout, green hair, muscular, bodybuilder, muscles, (old:1.9), (adult:1.9), (teen:1.9)
Steps: 50, Sampler: Euler_Max, Schedule type: Automatic, CFG scale: 5.5, Seed: 3941454536, Size: 1600x896, Model hash: 76abbfd047, Model: novaFurryXL_ilV160, Denoising strength: 0.55, Clip skip: 2, ControlNet 0: "Module: openpose_full, Model: illustriousXL_v10 [7c192463], Weight: 1, Resize Mode: Resize and Fill, Processor Res: 1600, Threshold A: 0.5, Threshold B: 0.5, Guidance Start: 0.0, Guidance End: 1.0, Pixel Perfect: False, Control Mode: Balanced, Hr Option: Both", Mask blur: 10, Inpaint area: Only masked, Masked area padding: 132, Lora hashes: "StS_Age_Slider_Illustrious_v1: bb11fa34470b", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

[To generate images I used the program "ForgeUi" and for corrections and Inpaint]