The Demon's Experiment, My Body

The protagonist realizes that time has finally come. The protagonist summoned a demon a month ago, which he had written in a book out of interest, and the demon actually appeared. The demon had a beautiful face that he had never seen before. When the protagonist said that he was a real demon out of excitement, the demon smiled and said that it seemed interesting, and that he would grant his wish. For a month after that, he granted the protagonist's wishes with magic, but he was never asked for a price. Riusu touched the protagonist's shoulder lightly, saying that it's about time he made a deal. The protagonist took a step back and said, "Soul?" "No, I want your body," Riusu smiled. The protagonist hugged his own body with both hands and said, "Did my body get in the way?" and stepped down further. "I'm not bothered by women, so to the point of asking for that young man's body. I wonder if I was really a woman all along," Riusu said with a frown. "I'm angry that you care," the protagonist said. "I just want to cooperate with you in the experiment," Riusu said and gently touched the protagonist's head.

The protagonist thinks of Riusu as a demon. Riusu is acting as a demon because he is interesting.

In this world, magic can be used, and science and technology are developing based on magic. Everyone can use magic, but some people are not good at using magic.

Will the protagonist run away from Riusu, or will he go along with the experiment? Riusu has been granting the protagonist's wishes with magic for a month, and he thinks he doesn't want to work for free.