(Kimi no Sentaku.) [osos (Pukapuka)] Hitotsu Yokereba mata Futatsu (Undertale)

(きみの選択。) [osos (ぷかぷか)] ひとつよければまたふたつ (UNDERTALE)

Parodies: Undertale (63)

Characters: Sans (15) Papyrus (6)

Tags: Yaoi (57612) Males only (48197) Incest (48184) Skeleton (5)

Languages: Japanese (324643)

Artist: Pucapuca (2)

Groups: Osos (2)

Categories: Doujinshi

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Sans & Papyrus' Forbidden Skeleton Yaoi Passion: Undertale Incest Doujinshi by Osos Group

Dive into the taboo world of Hitotsu Yokereba mata Futatsu (きみの選択。), where skeletal siblings Sans and Papyrus explore forbidden pleasures in this 22-page yaoi fest. Osos Group's Pucapuca artistically renders every bone-tingling moment of incestuous ecstasy—grinding pelvis against pelvis, moaning into hollow ribcages, and climaxing with spectral cum. Fans of monster toyplay will crave this skeleton smut. Check out more Undertale depravity like Flowey's twisted games.

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Undertale Bone Brothers Unleashed: Explicit Sibling Lust in Hitotsu Yokereba mata Futatsu

The Undertale universe cracks open in Hitotsu Yokereba mata Futatsu as Sans dominates Papyrus with relentless skeletal thrusts, their bony cocks grinding in a symphony of incestuous groans. Pucapuca's art captures every lewd detail—pre-cum dripping from ivory shafts, phantom tongues exploring vertebrae, and the brothers' shared climax that shakes the Underground. This isn't just yaoi—it's a raw, no-holds-barred skeleton fuckfest where Papyrus begs for 'more bone, brother!' while Sans rams his ectoplasmic seed deep. Discover similar taboo heat in inked monster fantasies or explore Monster Service Shop's carnal offerings. Warning: This 22-page doujin will leave you aching for your own skeleton pounding—no mercy, just pure brotherly lust.