If it's a relatively unknown 'hello love novel', you could try searching for it on niche book - related websites or forums. Some independent authors use their own websites to sell or promote their works, so that could be another place to look. Also, checking with local libraries or small - scale bookstores might yield results if it has been distributed in a limited way.
You could try looking in your local comic book stores. They usually have a wide variety of graphic novels.
You can also check libraries. Some libraries have a growing collection of light novels. Ask the librarian if they have a copy of the 'hello world light novel' or if they can order it for you. Additionally, fan communities and forums related to light novels might be able to point you in the right direction. They might know of some niche stores or online sources that carry this particular light novel.
You can try looking for it on popular digital game platforms like Steam. Many visual novels are available there.
Online platforms like Amazon also offer a wide range of 'Hello Kitty Bedtime Stories'. You can search for them by typing in the exact title or just 'Hello Kitty Bedtime Stories'. There are both physical books and e - books available, so you can choose according to your preference.
You can try Archive of Our Own (AO3). It has a large collection of fanfics including many 'bts hello baby' ones.
Social media platforms can be a source as well. On platforms like Tumblr, there are users who write and share 'hello kitty fanfic'. You can search for relevant hashtags like #hellokittyfanfic to find these stories.
As I said before, I'm not sure if there actually is such a novel. So, it's hard to say where you can find it. If it does exist, you might start by checking with local independent bookstores. They sometimes carry more unique or less - known titles.
You could try looking for it in local bookstores that carry light novels. Sometimes they have a dedicated section for Japanese light novels.
You can find some great 'Hunger Games' fanfiction on FanFiction.net. It has a large collection of stories written by fans from all over the world. There are also some on Archive of Our Own (AO3), which has a more organized tagging system for easier searching.
Check out some specialized light novel websites. Some of them might have this particular novel available for purchase or even for free if it's not under strict copyright protection. However, make sure to use legal and reliable websites to avoid any issues.