As the heir and manager of the prestigious Himeya Company, Aika S. Granzchesta shocks her peers by defying tradition and turning down the company's famed gondola inheritance. Perplexed by her mentor's choice, Aika's apprentice, Azusa B. McLaren, confronts her in vain. Determined to unravel Aika's motivations, Azusa and her fellow Undines scheme to arrange a clandestine meeting. With winter approaching in the serene Neo-Venezia, Aika reflects on her journey as an Undine, cherishing the pivotal moments that shaped her. Embracing the memories of her past, Aika finds solace in the belief that they will illuminate her path towards an uncertain yet promising tomorrow.