[Honkai: Star Rail/Western] An Investigator's Life, Starting as a Suspect

[Probably a watch-along story? Still undecided. Don't ask why Jing Yuan and Brother Sunday are here. The answer is fate.] [Honestly, I can't think of a Dan Heng ship, so let's just make him ship himself. The pairing is Dan Heng IL x Dan Heng. (No, that's not a typo.)] [A crossover with various British and American works: Sherlock Holmes, The Phantom of the Opera, The Great Gatsby, The Call of Cthulhu, and so on. Works that can be included in the paid section are listed here.] The appearance of a mysterious notebook leads the Astral Express Crew to a blue planet called Earth. Along with their visitors, Jing Yuan and Sunday, they are unexpectedly trapped there. The eerie descends. After the great fog rolls over London, the evil, corrupted offspring of the gods writhe their tentacles up buildings from every corner of the city. The bells ringing throughout the city become tainted with delirious whispers. The dead victim lifts the hem of her gorgeous dress with bare feet and dances, while wriggling maggots shake loose from her tattered, rotten clothes and body. In the darkness, in the fog, those approaching are no longer merely the steam, gentlemen, and ladies of the City of Fog. Do not meet their gaze. Do not pry. The unspeakable god opens its eyes in the abyss. On the first page of the notebook's remaining pages, the mysterious author wrote: To those who come after me, whatever reason brings you to this planet, remember that every inch of its land has rotted. Any attempt to turn things around is futile. Leave. So... "I'm saying, Mr. Dan Heng, we can't identify the culprit directly with supernatural powers..." The middle-aged, bald detective, his beer belly straining his uniform, was sweating profusely as he repeatedly bowed to apologize to Dan Heng. "Our laws haven't been updated yet. This kind of evidence won't convince a judge or jury." With personal guidance from the great detective, Ms. March 7th! Starring the Astral Express Crew! How will the little blue dragon, suspected of murder, clear his name? Why has an innocent planet become a playground for eerie monsters? Behind all these questions, can the Astral Express Crew solve the mystery and escape this strange place? Screams, mysteries, thrilling chases: after the Yungong case, here comes another exciting mystery adventure! Amber Era 2158, the City of Fog! A spectacular opening! "Mr. Dan Heng, how can you prove that what you saw wasn't a hallucination?" "Supernatural powers? Gods? We're just ordinary people seeking the truth amid the chaos." "If we don't find the truth, Dan Heng will... No, no, we can't panic. Clues, clues..." The watch-along group says: "Huh? You're asking me? I wasn't the one who killed them." "Logical assessment: Ms. Herta, your deadpan jokes are pretty good." "A mysterious life form..." "I feel like Ms. March 7th and my brother, the Trailblazer, seem more like the main characters." "The truth? Let me think... Bang! I win!" "Qingque, you're slacking off again!" "Ugh, the food looks awful." "Everyone... does nobody care about Mr. Dan Heng?" "Hey, what are you afraid of? All of them together couldn't take him. If it comes to it, I'll step in!" "Silver Wolf, shouldn't we say something too? But somehow, it doesn't feel right to do that." "Don't worry. With me here, they won't be able to track down our location." Theme: Live life earnestly