Collar, requested by chang827 on discord.
I do not own any of the artwork included in this post. This post and this website is only here for educational means, I do not earn anything from it. You should go support those artists, by CLICKING ON THE IMAGES TO GO TO THE ARTIST PAGES. If you wish to download the material, download it from the pixiv page.
Link to Senpaiheat Official Discord : https://discord.gg/yaxYUWV
Link to Senpaiheat Official Reddit : https://www.reddit.com/r/OfficialSenpaiHeat