Belly Button Chan: Carnival ~ Marlon Takeuchi~ [HISA’s Archives]

Editorial Review

Belly Button Chan positions itself in a niche intersection of 2D action-adventure and adult visual novel design that remains underexplored in the English-language doujin market. The reliance on ACPlayer—a custom engine requiring separate installation—immediately signals this as a passion project operating outside conventional DLsite frameworks, lending it an experimental, almost retro indie quality.

The work’s distinctive appeal lies in its deliberate absurdism: a mysterious powder that transforms into bathhouse-adjacent spaces anchors gameplay that explicitly blends graphic novel narrative with action mechanics. The combination of voyeurism and yuri framing within a harem structure is uncommon enough to register as tonally specific—this isn’t aspiring toward immersive romance but rather leaning into the voyeuristic premise as its core appeal. The tag constellation (older sister, younger sister, big breasts) suggests a game that wears its fetishistic interests openly rather than dressing them in narrative justification. The open-world framing with “open gates and yards” implies environmental exploration, though the synopsis remains vague on whether gameplay centers on action combat or interactive voyeurism mechanics.

What’s immediately unclear is execution quality: synopsis descriptions of “intense sexy graphic novel style” don’t confirm whether this translates to compelling visual direction or merely serviceable pixel work. The engine choice will likely frustrate players expecting seamless desktop integration, which may significantly impact session longevity.

This appeals primarily to players who specifically seek out unconventional doujin that prioritize conceptual oddness and unfiltered fetish content over mainstream production values or narrative sophistication. Those seeking polished action-adventure mechanics or character-driven storytelling should look elsewhere.

A deliberately strange piece that succeeds or fails entirely on whether its bizarre premise and engine-specific nature feel charmingly experimental or laboriously niche.