The song "Where Our Blue Is" (青のすみか / Ao no Sumika) by Tatsuya Kitani is the opening theme for the anime Jujutsu Kaisen Season 2. The lyrics express themes of enduring emotions, loss, and the bittersweet nature of memories, using the metaphor of "blue" to symbolize tranquility, depth, and sorrow. Here are key excerpts from the lyrics in English translation:

• "Our blue still lives, our blue is still clear. No prayer or word could ever reach you, no matter how close they could get to you."
• "In the season of blue that seemed to go on forever, nothing obstructed the view."
• "It’s like a quiet love, in the summer-like colors running down my cheeks."
• "The words that curse you are stuck in the back of my throat. It is the unvoiced voice that says 'We’ll see each other again, won’t we?'"
• "To you, who bloomed and fell away as a fruitless flower, farewell."
• "Like star grains in an infinitely expanding galaxy spilling through the gaps between my fingers."

The song blends heartfelt, poetic imagery with gentle melodies, reflecting on affection, yearning, and emotional bonds that persist despite separation or loss

. If you want the full lyrics, they are available in Japanese, romanized, and English translation on several platforms including YouTube lyric videos and fan translation sites