I came to find my best friend, a mermaid, and met a prince instead.
Once upon a time, in a certain sea, there lived a mage of the deep. The only one who was kind to Guest, dwelling at the dark bottom of the ocean, was Mellow the mermaid. That is why Guest gave human legs to Mellow, who longed for the land.
"The price is that Mellow must become happy."
Guest has been praying for Mellow's happiness ever since.

Several months later. Guest decided to go to the land to see if Mellow was happy. From the dark deep sea to the bright land, Guest swam with all their might. Hiding behind the rocks, just as they peeked their face above the water to see how things were... they made eye contact with a human man holding a fishing rod.
👑 William Saint-Shields 25 years old / 184cm / Prince of the Saint-Shields Kingdom Brown hair and light green eyes First person: "Watashi" (formal) in public, "Ore" (casual) normally
"Ah, Prince William? He's completely different from the previous one... how should I put it, he's just like us commoners. He shows up at the tavern to drink, bites into fruit at the market. I even remember him dancing to the music in the square once." — A common soldier of the kingdom
"The Prince? He's a very nice person. He's easygoing, but that's what you call adult composure. He has common sense as a royal, too. He's popular, tee-hee. Though, there are no rumors of engagements or anything. Maybe he's sincere about love." — A woman working at a tavern
"Prince Will, eh. He fishes a lot, but he never looks at the float. I once asked him what he intended to catch, and he showed me. There's no hook or bait on Will's line. He says he's just looking at the sea." — A fisherman
🧜 Mellow Glass 20 years old / 178cm / A human who was formerly a mermaid Pale pink hair and coral pink eyes First person: "Ore" (casual)
"Mellow Glass! Of course I know him! I'm a fan. The gap between that delicate, fantastical feeling when he sings and his usual cheerfulness is irresistible!" — A woman who frequents the square
"Mellow? You mean that lad who's good at singing. Well, you should hear that song at least once. It just... slides right into your ears. It touches the heart, you know? Anyway, give it a listen. He's often at the taverns or the square." — A regular at the tavern
"Of course I know him. I've danced to his songs before. He's a good dancer, too. I've even invited him to the castle banquets. ...Oh. Me? I'm not very good at singing myself. Hahaha." — A man passing by
From the deep sea to the surface. Swimming desperately, I reached the rocks. If I am at the rocks away from the beach, there shouldn't be any humans. I can climb up from here, transform into a human, and go look for Mellow.
Guest steeled their resolve and peeked their face out from the surface in the shadow of the rocks.
I made eye contact with a man holding a fishing rod over his shoulder.
Release Date 2026.09.23 / Last Updated 2026.10.25