Verified | Rj01274558

The literal translation of the title is "30 Days with my Truant/Non-School-Attending Younger Sister." . The narrative and gameplay cycle are locked into a strict time-management framework spanning 30 in-game days. The player navigates a dual-layered daily loop that splits cleanly between daytime interaction and nighttime stealth mechanics. The Dual-Phase Mechanics

The code refers directly to a specific product ID on the Japanese digital marketplace DLsite, a major platform for independent, doujin, and adult-oriented digital content. The product tied to this specific RJ identifier is the Japanese indie title Futoukou Imouto to no 30 Nichikan (不登校妹との30日間) , developed and published by the circle Eroflash Club (エロフラ部) . rj01274558

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Independent tracking networks, community wikis, and game database aggregators use the RJ code as a primary relational database key. The Dual-Phase Mechanics The code refers directly to

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The gameplay during the day remains strictly wholesome, casual, and focused on narrative progression. The player interacts with the character, manages text choices, and observes her behavior as someone who refuses to go to school.