Storyboading Manga | Comics Tutorial by WhytManga

Hi I love your art, and I recently discovered you via your youtube page, I have only just started watching your videos, but I'm finding them really interesting and helpful I just wanted to ask, when starting your manga series, when you first came up with the concept, how did you go about writing the story and the characters etc. I have a general concept but I'm finding it difficult to flesh out the story and develop the characters, and wondered for your story Apple Black, as it is an ongoing series, have you planned out the entire story and know exactly will be featured for each chapter?

Hope this question makes sense Keep up the awesome work