Gamebook DS - Aquarian Age - Perpetual Period

Aquarian Age: Perpetual Period is a visual novel RPG with branching story paths and multiple endings, set in the Aquarian Age universe. Players follow Kokona Suzushiro, a high school girl drawn into mysterious fires and a murder case involving supernatural powers. The protagonist is a lazy, orphaned, slightly perverted brown-haired high school boy who rescues heroines in a typical isekai-style plot. Gameplay mixes story reading with choice-based decisions at key moments, plus light visual novel elements and some action or exploration sections. Key characters include the tsundere childhood friend/cousin (violent and terrible cook), her competent little sister, a blue-haired loli of mystery, and a white-haired counterpart. It stands out as a faithful adaptation of the Aquarian Age trading card game lore into a portable DS gamebook format, blending supernatural mystery with romantic tropes and high replayability through different branches.