Missing - The Fairytale-like You Goes on the Assault

If it respects the Manga Guidelines, you can add an entry to the queue for approval with this form.

That one won't be approved, tho. The Author does share his drawings on Pixiv, but not as an official comic publication. He also first uploads them to his Twitter. Such Webcomics are not allowed in the database; they would need to be officially published in one of the whitelisted site, or receive a printed Volume.