Rather than seeking 'Dark Souls' stories on Hentai Foundry which has a bad reputation for inappropriate content, you can check out YouTube channels that discuss 'Dark Souls' lore and fan - created stories. There are also some indie game magazines that sometimes feature interesting 'Dark Souls' - related tales.
I think it's likely to involve some kind of hidden or private elements related to adult content featuring young girls. But this kind of manga is often not appropriate and may be against the law or ethical standards.
The secret of Qing Yunian's Dark Clan was the Forbidden Door. In her letter to Fan Xian, Ye Qingmei mentioned that there was a forbidden door hidden at the bottom of Taiping Courtyard's lake. It might be a laboratory. There might be modern high-tech equipment inside, such as mobile phones, navigation, computers, and so on. The Forbidden Door involved the secrets of human birth, aging, illness, and death, as well as the truth of human extinction. Fan Xian might open this door and enter the hidden door. There might be many truths he wanted to know inside the hidden door. The Qing Emperor also knew that the bottom of Taiping Courtyard's lake was different, so he had always sent troops to guard it in order to keep this secret. However, the search results didn't provide a definite answer, so I didn't know what was inside Qing Yuannian's Dark Clan.
The secret of Qing Yunian's Dark Clan was the Forbidden Door. In her letter to Fan Xian, Ye Qingmei mentioned that there was a forbidden door hidden at the bottom of Taiping Courtyard's lake. It might be a laboratory. There might be modern high-tech equipment inside, such as mobile phones, navigation, computers, and so on. The Forbidden Door involved the secrets of human birth, aging, illness, and death, as well as the truth of human extinction. Fan Xian might open this door and enter the hidden door. There might be many truths he wanted to know inside the hidden door. The Qing Emperor also knew that the bottom of Taiping Courtyard's lake was different, so he had always sent troops to guard it in order to keep this secret. However, the search results didn't provide a definite answer, so I didn't know what the secret of Qing Yuannian's Dark Clan was.
The secret of Qing Yunian's Dark Clan was the Forbidden Door. According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory. There might be modern high-tech equipment inside, such as mobile phones, navigation, computers, and so on. The Forbidden Door involved the secrets of human birth, aging, illness, and death. Fan Xian might open this door and enter the hidden door. There might be many important items and secret documents inside the hidden door. To be specific, the Forbidden Door could be a portal to the temple. Through the folding fan portal, one could enter the world of the temple, which was the frozen modern civilization. Ye Qingmei warned Fan Xian not to open this door because it might subvert order. In general, the secret of the Qing Nian Dark Clan involved taboos, laboratories, high-tech equipment, temples, and modern civilization.
The secret of Qing Yunian's Dark Clan was the Forbidden Door. According to Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of Taiping Courtyard's lake. It might be a laboratory. There might be modern high-tech equipment inside, such as mobile phones, navigation, computers, and so on. This door involved the secrets of human birth, aging, illness, and death, as well as the truth of human extinction. Fan Xian finally opened the secret door at the bottom of the lake. Entering the secret door, he might have discovered the truth of many things he wanted to know. The Qing Emperor also knew that the bottom of Taiping Courtyard's lake was different, so he had always sent troops to guard it in order to keep this secret.