Trivia / Jellyfish Can't Swim in the Night

• Anime First: An original anime project; the manga adaptation began the same day the anime started airing.
• What Could Have Been: Yuuki Yaku revealed on his Twitter on May 15, 2024 that Episode 6 had an earlier draft version that was quite different from the final version that aired. The original Episode 6 would have had Mei witnessing Kano pecking Yoru on the cheek at the end of Episode 5, and then dropping the good fortune talisman she had gotten from that episode that would have revealed bad luck in store for her love life. Mei then would have left a note saying she was leaving for Okinawa, and the other three girls would have tried to bring her back, but thanks to a ticket mixup, she ended up in Hokkaido instead, where she would then meet and grow close with a mother who had once aspired to become a piano teacher and her daughter. In the end, this initial draft was scrapped due to the staff unanimously agreeing it didn't live up to the standards set in the first five episodes, and Episode 6 was rewritten to focus only on that last concept of a musician mother trying to raise her daughter.

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