I decided to split the main story and the second (kind of... the true intended ending?)

He smiled at the woman beside him, as she cuddled into herself, pulling the blankets closer to her. The two had just finished coupling. He pulled her closer to him, placing a gentle kiss on her shoulder then her neck. Who would have thought this is where they would be. Certainly not he. Their first meeting at his uncle's veterinary practice was impossibly awkward. And the year since then she had been so cold and distant towards him. He would not believe that a bowl of ramen and bonding over ancient history and training methods would be what brought them together, but it did.

They dated for a little over two years before he summoned the courage to get down on one knee, and ask her to be his partner in life. He remembered all the planning, the coordination that was put into the wedding. His best friend was taken aback that someone as kind and sweet as Kagome would marry him. But her feistiness and fervor kept him in check. Her patience and understanding warmed is roughened heart. Her compassion towards animals and humans alike restored his hope. He thanked his lucky stars she was happy to be with him. That she would say yes to being his wife. He could only be more thankful that they had just celebrated their two years together.

He was thankful, so thankful that she could be happy. Inuyasha sighed, as he slumped against the wall. How cruel of fate, to bring he and Kagome together like this. There was no clear way for him to know how this had happened. One day, he passed away due to an injury from a foreign traded weapon, the next he had woken up in the well. He glanced back, envious of Masaru and how he could tightly embrace Kagome. His Kagome. Despite the envy, he was happy that he had the privilege to see her be happy. He got to see her fall in love again, and though it hurt him to know he was not the one she was with, his heart was content to know she was taken care of by someone who loved her as much as he once did. A part of him, the bitter part, wondered if she fell in love with Masaru for how similar their appearance was. He could not deny that Masaru looked uncannily like him on his human nights.

He sighed, as his head fell forward to look at the ground. He noticed his feet were now disappearing. He smiled ruefully, knowing full well what this meant. How cruel of fate, indeed. He stepped forward, somehow he was able to still press onwards. He sat in front of Kagome, and placed his hand on hers. She shivered. He supposed the rumours were true. Ghosts, spirits, were cold. His fingers curled around her hand and he gave a gentle squeeze. He looked at her face, and memorized all the small details. The pale pink, almost like sakura petals, of her lips. How her nose, lacking a prominent nose bridge, curved gently to form it's button shape. Her eyelashes long and fluttering as she dreamed. Inuyasha deeply longed for her to open her eyes, so he could see the rich deep blue that he had dreamt of in the years he lived without her. Fate, was certainly not on his side. He held onto the image of his sleeping Kagome. He watched carefully, all the while hoping, praying her would be a good son to her. He hoped he would not give her too many problems, that he would not cause her grief. As he felt his body slowly fade; a bittersweet solace, knowing at least he could love her the way she deserved to be loved, unconditionally. As for himself, he was blessed to be given the privilege to be loved by her again. He sighed, smiling as he watched the woman he loved for 500 years, even in death. "At least, at the very least, in my next life…" He leaned forward and took this last chance, his last chance to have her before their relationship changed for this lifetime. He placed a chaste, tender kiss on her lips. "I can be yours." He whispered as his soul disappeared, to be reformed into a new life.

I really like dramatic irony.