The experiment Sein was about to conduct on the mermaid named Elisa was soul modification, instead of the soul seal removal she had expected.2

Sein, it turned out, was not as benevolent as Elisa had hoped.1

Before the experiment began, Elisa finally remembered that she should sign a magic contract with Sein, but he rejected her request.0

“I need to focus all my energy on removing the soul seal on your forehead, and I can’t waste any of it to create a magic contract right now. You wouldn’t want to end up as a retard due to my experimental errors, would you?” he said.1

Elisa, not well-versed...0