Nanami Kokoro (七三心), also known as '753♡', is a central character in the series '2.5-jigen no Yuuwaku'. She is a popular gravure idol whose unique charm and playful personality have captivated fans both in the story and in-universe. Kokoro plays a pivotal role as the love interest of the protagonist, and her journey explores the boundaries between the real and fictional worlds. Her character brings a mix of innocence, wit, and emotional complexity, making her a memorable presence in the series.