Sorry for not updating in a long time.
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Seiryu crashed through the side of the Special Investigations Headquarters building, caring only about Kasai. The dust stirred up by the intrusion slightly burned his eyes and throat. His sides hurt with every breath he drew into his starving lungs. "Kasai! Where are you?!" Upon not receiving an answer, he raced through the hallways, phasing through the doors to learn of who resided in them.
"Oh, Seiryu, in here." Seiryu crashed through the door, Chaotica drawn. He felt his blood boil as is eyes came to rest on Ragnaruke standing in the middle of the room, Kasai laying motionless in his arms.
"Let her go you bastard!" Ragnaruke chuckled.
"Tell me, Seiryu, what number is above her head?" Seiryu trembled and activated his Shinigami Eyes. His heart sank.
"S-Seven minutes."
"That's right. She has seven minutes to live. Gohaku's poison has made sure of that." Seiryu's body shook with rage. His hair moved as if on fire.
"Give her the antidote! Now!"
"I might. But only if you give your life for hers."
"What?"
"I might save her life by giving her the antidote. But only if I get to kill you instead." Seiryu growled.
"How do I know you wouldn't kill her right after killing me?"
"You'll just have to trust me."
"Never!" Seiryu jumped and stabbed Ragnaruke through the shoulder. He pinned him to the wall and grabbed Kasai's body. He jumped back across the room and held her in his arms. "K-Kasai..." He kissed her soft lips and set her down, his heart aching.
"Tell me, Seiryu. Do you hate me? Do you want to rip me into shreds?"
"What the hell do you think?!"
"Just making sure. Your powers are super strong when you're angry." Seiryu yelled and punched at Ragnaruke, who blocked the attack and stabbed his hand through Seiryu's abdomen. A gurgled groan escaped Seiryu's mouth. Ragnaruke chuckled. "Pathetic fool. You could've done the smart thing and died believing that you had saved her. Now you must die knowing that you failed her." He dropped Seiryu and summoned his scythe. "Die now!"
"No!" The scythe fell from his hands as a sword was driven through his chest. Ragnaruke fell to his knees.
"What? Who would dare-" Behind him stood a trembling Kasai. "But how-"
"You dropped this." She hit him with an empty vial. "Next time, don't bring the fucking antidote with you." Ragnaruke growled and swung around, hitting her legs with his scythe. She let out a pained cry and fell, hitting the floor hard.
"Go to hell you bitch!" He struck at her head but Seiryu grabbed his arm.
"Don't you dare harm my mate!" Seiryu punched Ragnaruke in the head as hard as he could, sending him backwards into the wall.
"Seiryu!" Kasai wrapped her arms around his waist. He reached down and gently rubbed her hand.
"K-Kasai, I want you to get out of here. Ragnaruke is almost invincible and I can't protect both of us."
"Not to sound cliché or anything but... No! I won't leave you!"
"But-"
"Just shut up and let me help!"
"I just don't want to lose you."
"And to think I was afraid that I'd sound cliché."
"Would you two shut up?!" Ragnaruke stood and dusted himself off.
"I'll kill you!" Seiryu roared, angrily.
"I don't think so." Seiryu gasped and fell to his knees. Embedded in his back was Ragnaruke's scythe, Sinaka.
"S-Seiryu..." Tears streamed down Kasai's face. "You son of a bitch! I'll kill you!" She grabbed Chaotica and charged at Ragnaruke. He smiled and grabbed her wrist, causing her to drop the sword. She tried to hit him with her other hand but he stopped her by grabbing her wrist and squeezing it. Her wrist bones began cracking from the pressure. She opened her mouth to scream in pain but Ragnaruke silenced her with his mouth.
"Get the hell away from her!!!" Seiryu ripper Ragnaruke away from Kasai and stabbed Sinaka through his head. Ragnaruke dropped motionless to the floor.
"Seiryu!" She embraced him in a hug.
"K-Kasai, tell me something."
"Yes?"
"How did you know where he was?"
"He was covered in your blood."
"Oh."
"Can we please go home?" Seiryu glanced at the still unmoving Ragnaruke.
"Right." He stood and started to pick her up but stopped as hot pain shot through his abdomen. "I-I can't carry you." She put his arm around her shoulder.
"Then we'll walk."
transition
Kasai didn't really care if people gave her strange looks because of the way she walking as they made their way back to her house. Once they were inside the house, she let him fall onto her bed. She lightly kissed him before she began pulling his clothes off. He smirked and let her continue. When he was stripped of everything except his boxers, she stopped and walked into the hallway. Seiryu started to sit up but stopped as pain shot through his body. He sighed and closed his eyes, both his body and what he considered his soul were tired.
He slightly raised his eyelids as he heard someone walk into the room. "Kasai, what are you-"
"Shut up." She slowly cleaned and bandaged his wounds. He simply laid there and let her work. When she was done and was standing to leave the room, he gave her a confused look.
"Where are you going?"
"To sleep in the living room. You need to rest and I might bump into your wounds if I slept in here." He sat up enough that he could grab her hand. He pulled her down onto his chest and kissed her. She broke it and tried to leave but stopped fighting when he kissed her again. "But your wounds-"
"We Shinigami heal faster when we have sex." They kissed again.
"Liar." They kissed once more.
"Shut up."
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They then had sex. And unfortunately, I do not write lemons. I've never been good at writing them so I won't attempt one for this story. Just note that there will be a chapter after this one. The next chapter will be the final one so be sure to read it.