Synopsis
●Story
Yuto Ishiurui, a troubled youth from a difficult family background, enrolls at Kiyoshu Academy, an exclusive co-ed boarding school, to become a man worthy of his cousin and fiancée Nagisa Ishiurui, who was his inspiration for reform.
Surrounded by friends and Kaori Momose, Nagisa’s best friend who constantly involves herself in his affairs, Yuto enjoys fulfilling days of studying and club activities.
However, by chance, he discovers that Nagisa has been undergoing anal development with Kaori’s assistance. Initially bewildered by this unexpected side of the well-rounded Nagisa, Yuto agrees to help her manage her sexual desires when her unusual fetish begins interfering with her academics and club work.
Thus begins their pure relationship—a commitment to preserve their chastity until marriage.
●Diverse Anal Sex Through the Changing Seasons
Over one year until third-year student Nagisa’s graduation from Kiyoshu Academy, with Kaori’s help, Yuto indulges in anal sex with Nagisa during seasonal events: Golden Week, summer festival, school festival, Christmas, Valentine’s Day, and graduation ceremony. As he continues, Yuto himself becomes increasingly addicted to Nagisa’s anal sex.
Various positions including doggy style, cowgirl, standing, and Y-position. Numerous exciting anal acts: buttjob, soap play, rimming, enema, outdoor sex, fisting, and more. Diverse costumes from sailor uniforms to kimonos and festive wear.
Choice-based scenarios include scenes with Kaori.
●Heroine features full voice acting by Asagi Shiki
Flip-book animations in select events
Editorial Review
This is a niche anal-focused visual novel that frames extreme fetish content within a romance framework—a structural choice that distinguishes it from more straightforward adult games in the fetish space. The work positions itself as a character-driven narrative rather than a pure scenario collection, banking on the tension between Nagisa’s carefully maintained public image as a “Yamato Nadeshiko” (idealized traditional woman) and her private sexual interests. This gap between persona and reality is the conceptual spine holding together what would otherwise be a disconnected series of fetish scenarios.
What makes this work distinctive is its commitment to temporal scope: the year-long progression through seasonal transitions provides structure that many fetish-focused titles forego entirely. The involvement of Kaori as an active facilitator—rather than simply a rival or secondary character—creates an unusual three-character dynamic that complicates the typical fiancée relationship. The tag combination of virginity preservation with extreme anal content is deliberately contradictory in a way that suggests the work is aware of its own conceptual absurdity; the “pure relationship” framing is clearly rhetorical irony.
The expansion and fisting tags indicate this sits in the more intense subcategory of anal content, positioning it well beyond vanilla or curiosity-driven exploration. This is fetish material for people with established interests in this specific direction, not an introduction or gateway work.
Readers seeking character development and emotional investment will find the premise promising but should temper expectations—visual novels with this fetish concentration typically subordinate narrative subtlety to content focus. This lands squarely for longtime enthusiasts of anal-specific content who value at least a minimal romantic framing and seasonal variety in their scenarios. For that specific audience, the combination of narrative consistency and sustained fetish focus delivers what it promises without compromise.
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