The franchise’s longevity owes much to its “portable” incarnation, which turned a passive OVA into an engaging, re-playable experience.
Given the specificity and the potentially adult-oriented nature of your query, I'll provide a general response while being mindful of the content guidelines.
The animation was produced as a short series, premiering in late 2024. Release Date November 29, 2024 (Japan) Production Company Adult, Fantasy, Animation Episode Count 2 Episodes (as of mid-2025) The mention of a "Portable"
: Websites like NicoNico Douga, Pixiv, or Doujinshi.org might host or link to relevant fan-made or professional content.