One of the themes of the work is the pair of red and blue blood, which are used as the key colors for the OP respectively. In the season 2 OP, the blue key color is expanded into the main motif of images such as the sky, the sea, and bubbles. Since many of the main motifs are organic in nature, we incorporated fluid simulations using x-particles and added fluctuations and ripples to the typography animation as well, creating an expression that closely aligns with the theme in every detail.