Dichotomy Illusion: The Coser Disassembly Incident

The bisected corpse
split precisely along its central axis and gruesomely suspended from a dilapidated ceiling fan - belonged to a former underground idol and cosplayer who had gained local fame in the commercial district. The bisection occurred during production of a live-action promotional video for an unreleased sequel to a Chinese indie horror game...

Shortly after the bisection incident... severed limbs of a woman began surfacing in niche culture stores across the Commercial District, each bearing bizarre yet distinctly coded terminology comprehensible only to hardcore ACGN enthusiasts...

The cases may seem like closed chapters, all present efforts appearing as futile gestures. Yet when you launch the game and immerse yourself with genuine curiosity, you might seize the hidden truths of these twin tragedies, bearing witness to their ultimate reckoning through digital resurrection.
Character Introduction：
Armchair Detective / Curator

Investigation Aide / Citrus Sugar (IRL Handle: Cheng Zicheng)
Quizmaster, Primary POV / Solaris Custard

Chronicle-Bound Cast:
The bisected cosplayer, a socially challenged indie dev, a reassuring game editor veteran, an opportunistic photographer boyfriend trailing his cosplayer girlfriend for impromptu shoots, and proto-otaku twins whose crude promotional video operations resembled cavemen discovering fire...
Their stories laced with cryptic agendas (a subjective yet imprecise descriptor) during the incident will gradually crystallize through digital ephemera.
Yet this is merely the prologue, nothing but an overture.

Supporting Cast of Chaos:
Elementary schoolers obsessively pinning otome game husbandos on their itabags? The gyaru merch boutique clerk at "Spring Valley" compulsively collecting PokeCough Mon catalogs? A plus-sized staffer in band tees sneaking fancams of indie idols from livehouse control booths? A four-member girl band resembling chromatic warriors from some yuri rock manga (with their cerulean bassist currently AWOL in legendary fashion)...
These gloriously unhinged denizens of the ACGN underworld shall aid the investigation through chaotic means, for critical clues might lurk within their meme-laden otaku-speed diatribes – postmodern hieroglyphs demanding cultural literacy to decode.

Scene Recon Log
In their investigation of the limb abandonment case, Solaris Custard and Citrus Sugar shall conduct "fieldwork" (or more accurately, fish-flopping) at these locations. Beyond the macabre biological evidence, the crime scenes themselves might spark morbid fascination among otaku-crossover socialites – each site functioning as geek pilgrimage grounds where murder-mystery tourism collides with ACGN subcultural ecospheres.
Merch Mausoleum: A resurrected deadmall where ACGN shops wage merchandise warfare amidst peeling posters of last season's waifus
PS5 Purgatory: A luxury plaza's white elephant - that overpriced PlayStation experience zone bleeding yen through its marble floors
Idol Crucible: A sweatbox dungeon vibrating with hardcore wota chants, where dreams of "next Cinderella" dissolve into body odor fog
Venue Vanitas: Livehouse boasting instagrammable neon façade but delivering sonic disappointment worthy of bargain-bin earphones
Collecting merch, grinding co-op achievements, snapping cheki with minor idols, enduring ear-bleeding band covers... Surely these ACGN detours during criminal investigations deserve absolution .
(Unless you claim to despise hanging with bro-coded gloom maidens - though that tsundere protest sounds sus coming from an itabag-toting legend like yourself.)

Core Case Matrix
(Visual evidence redacted per narrative constraints)
Chinese indie horror titles, rhythm games featuring idol project crossovers, that notorious domestic indie publisher, grotesque merch from a 90s mecha IP rife with faction wars and Oedipal mech-pilots, an onion-wielding digital diva, psychotic battle royale mascots reduced to environmental decor, and of course the retro cringe of girl band tropes - all deliberately stitched into the game's fabric like inside jokes carved in radioactive neon.
Should these culturally-coded Easter eggs trigger your neural pathways into involuntary mirth, congratulations on your otaku baptism. Discern the real-world IP correlations, and you might just outpace our protagonists in unraveling this bloodstained tapestry of references.