You can start by looking for it on popular manga reading platforms. Some common ones are MangaPlus or Webtoon. Just search for 'Killing Stalking' and you should be able to find it.
To my knowledge, Koogi hasn't produced any other significant mangas. Maybe they have some lesser-known works or are currently working on new ones that haven't been widely publicized yet.
Killing Stalking exists in both manga and anime forms. The manga provided the basis for the anime adaptation. However, both have their unique characteristics and might appeal differently to viewers depending on their preferences.
The synopsis of Killing Stalking is quite complex. It centers around a creepy and dangerous connection between two characters, filled with suspense and horror. The story delves deep into their messed-up dynamics.
Popularity of 'Killing Stalking' lemon fanfictions is likely to be relatively low. The nature of the original work is already quite extreme and controversial. Many fans would rather engage with fanfictions that add depth to the story, such as exploring the backstories of the characters or alternative endings. Moreover, the idea of 'lemon' fanfictions can be off - putting to a large number of people, so it's not likely to be a mainstream part of the 'Killing Stalking' fanfiction community.