Sunlight filtered through the leaves of the trees, creating a play of light and shadow in the forest clearing. Ren held Aiko in his arms, her body still weak from captivity. The joy of having rescued her was mixed with concern for her condition.Ayame, Kiko and Yumi surrounded them, moved by the reunion of the siblings. Kiko, impulsive as always, rushed towards Aiko, hugging her tightly."Aiko! You're safe!" she exclaimed with relief.Aiko, confused and still dazed, returned the hug with a weak smile. "Ren? Where are we?" she asked with a trembling voice."Calm down, sister. It's all over. You're safe," Ren said tenderly, stroking her hair.Yumi approached Aiko and offered her some water. "Drink this. It will help you recover," she said sweetly.While Aiko drank, Ren told his friends what had happened: the defeat of the Master of Shadows, Aiko's rescue, the dark energy that held her captive..."It's incredible that you managed to defeat the Master of Shadows," Ayame said in admiration. "You are a true hero.""I wouldn't have done it without your help," Ren replied humbly. "You are the best companions I could have."Kiko, with her usual enthusiasm, proposed celebrating the victory with a feast. "We should go back to the village and prepare a banquet in honor of Ren and Aiko," she said cheerfully.But Ren shook his head. "We can't stay here," he said sadly. "I have to go back to my world."A silence of surprise fell over the group. "Go back to your world?" Yumi asked incredulously. "But why?"Ren explained that Aiko needed urgent medical attention, and that in the human world they could find the best doctors and hospitals. Also, he had to tell his parents that Aiko was alive and safe.The girls understood his reasons, but the sadness was evident on their faces. "And when will you come back?" Kiko asked with concern."I don't know," Ren answered sincerely. "But I promise I'll be back as soon as I can. This world, you... you're part of me now."Kiko approached Ren and, with tears in her eyes, kissed him tenderly. "I'll wait for you," she whispered. "Don't be long."Ren returned the kiss with passion, engraving the sweetness of her lips in his memory. He knew that this goodbye was necessary, but he also knew that he would see her again. His destiny was linked to the yokai world, and to the three girls who had stolen his heart.With one last hug, Ren and Aiko said goodbye to their friends and entered the portal that would take them back to the human world. As the portal closed behind them, Ren turned to look one last time at the forest, the place where he had found adventure, friendship and love. He knew that this was not a final goodbye, but a see you soon. He would be back.