: Just like an ISBN for books, the code RJ01315413 points to one specific creative work, ensuring users can find the exact circle (creator group) and volume they are searching for.
This indicates the setting or theme is based on , a popular tactical role-playing game where "Kivotos" is the central academy city. Futanari Chaos Vol. 2 eng kivotos futanari chaos vol2 rj01315413 exclusive