Oh wow, jariku, that's a real deep cut. I think I stumbled across the term ages ago, maybe on some Indonesian forum? It's been floating around my circles lately too. From what I've pieced together, it's not about a single fandom or character—'jariku' is literally Indonesian for 'my hand.' So it's a genre tag for, uh, self-insert stories with a very specific focus. The protagonist's own hand is the central romantic partner. It sounds bizarre out of context, but it's born from that surreal, introspective, and often hyper-specific trope space where you take a mundane concept to an extreme for either comedy, psychological horror, or a weirdly poignant metaphor for self-love or isolation.
You won't find a dedicated 'jariku fanfiction' site because it's more of a niche trope tag used within broader fanfiction platforms. Your best hunting grounds would be Archive of Our Own or Wattpad. On AO3, you'd need to get creative with tags—searching for 'Self-Insert,' 'Sentient Body Part,' maybe 'Metaphorical' or 'Absurdist.' Sometimes writers use 'Original Work' as the fandom tag for these. Wattpad's search is trickier, but the algorithm might surface similar weirdly specific romance if you dive into the Indonesian tag ecosystem. I'd also lurk on niche writing forums or subreddits where people share prompts for oddball concepts; that's where I've seen discussions about crafting stories around inanimate objects as partners.
Honestly, the appeal isn't in a huge archive of ready-to-read content. It's in the conceptual playground. Finding one well-written jariku fic feels like discovering a secret note left in a library book—it's a singular, strange little artifact. The search is half the adventure, and when you do find one, it's usually short, experimental, and leaves you thinking about narrative possibility in a whole new way.