just in case anyone's looking for it, this is the JSHK art book from AidaIro (the series authors), and you can get it via the official listing on Amazon Japan: https://www.amazon.co.jp/dp/4757564554
btw, this illustration was the cover illustration of volume 8!
Thanks! I used Medibang Paint Pro, I believe this is the official website: https://medibangpaint.com/en/pc/
Pretty good program, and it's free. Hope this helps ^^
So uhh the signature is different because I have two Instagram art accounts- one is my main (splatoon themed) and the second (roroquirk: tbhk) CLICK THE LINK FOR INFO ABOUT THE CHARACTER http://aminoapps.com/p/2mvm3j Rumor: beware the stare of the tongueless ghost, he had no friends, only his voice. And if you mese him do not scream, or he’ll rip your tongue out at the seam.
The Japanese version of the art book dropped like a year ago on Amazon and it's still available for prime. I have a copy myself and the few mini comics that are in the back have already been translated and posted here or on other sites. But it is super awesome and enjoyable to look at! Here's the link if anyone doesn't care about english v. japanese:
あいだいろ画集 地縛少年花子くん https://www.amazon.com/dp/4757564554/ref=cm_sw_r_apan_glt_fabc_8KY5RGYVH7SQQR9E5HXC?_encoding=UTF8&psc=1
Here's the link!
100 Pcs Funny Waterproof Vinyl Anime Stickers Pack for Toilet-bound Hanako-kun, Stickers for Water Bottle Motorcycle Car Phone Guitar MacBook Flasks Bike Laptop, Decals Pack for Girls Kids Teens Boys. https://www.amazon.com/dp/B08GYRLZLM/ref=cm_sw_r_u_apa_i_-FSJFbBMPEH79?_encoding=UTF8&psc=1
I did get them on Amazon! Unfortunately most of the sticker packs are half fan art half official. But it was a pack of 100 and it was about $10 USD and its available for prime if you have.
Here's the link: 100 Pcs Funny Waterproof Vinyl Anime Stickers Pack for Toilet-bound Hanako-kun, Stickers for Water Bottle Motorcycle Car Phone Guitar MacBook Flasks Bike Laptop, Decals Pack for Girls Kids Teens Boys. https://www.amazon.com/dp/B08GYRLZLM/ref=cm_sw_r_u_apa_i_-FSJFbBMPEH79?_encoding=UTF8&psc=1
https://www.amazon.com/Toilet-bound-Hanako-kun-Vol/dp/1975311361/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=&sr= is the link on Amazon for chapter 4 paperback! However, it isn't out yet :( It'll be released on July 21st if your willing to preorder it!