If this doesn't work because of a pixiv layout update, leave feedback so I can fix it. バグや更新で使えなくなったらフィードバックを残してください。
You can bookmark without going to the related pages. Default setting includes all tags and R-18 illusts will be added as private. How to use: Press the ❤ buttons. Don't forget to update if you modified any settings. If you encounter any bugs feel free to leave feedback.