If you're trying to read 'Ruby Main' — especially the mature scenes — the best move is to stick to official distributors so creators actually get paid. I usually start by checking the big storefronts: BookWalker Global, Comixology (via Kindle/Prime), Google Play Books, Apple Books and
Amazon Kindle often carry officially licensed manga or graphic novels, including mature titles. If the book has an English publisher like VIZ, Kodansha, Seven Seas, or Yen Press, their shops or regional partners will usually list it. Buying a volume or single chapter there guarantees a legal, quality translation and keeps the creator supported.
Another habit I picked up is to check specialty stores for adult content: FAKKU is the go-to western platform that legally licenses and sells adult manga and often has age verification and DRM-free options. For Japanese originals and doujinshi, DLsite and BOOTH are legit stores where creators upload mature work; they also sometimes offer official English translations. If you want to avoid paying, see if your local library offers digital lending via Hoopla or
Libby/OverDrive — they sometimes carry more mature graphic novels legally. I tend to buy the books I love, but it's nice when libraries help bridge regional releases — either way, I'm happier knowing it's aboveboard.