A/N at the bottom due to spoilers.
"Simon, I don't have time for this. I have to get work done—"
But instead of budging, Simon picked up Izaya like he was a feather and threw him over his shoulder. "No matter. Shizuo hurt. Need you."
Izaya raised his eyebrows. "He's my mortal enemy. I couldn't care less if he died or not." ... Or did he? If Shizu-chan died, then there wouldn't be anybody left for him to has fantastic brawls with.
He sighed and let himself be carried away. "I just hope you're not expecting me to magically heal him or something. No way."
Simon didn't say anything, but just kept turning street corners until he finally stopped. Izaya was thrown off his shoulder, and he glared at his carrier.
"Shizuo here." Izaya stepped out from behind Simon, and his eyes widened in shock. One could hardly even tell the figure lying down flat on the sidewalk was Shizuo Heiwajima, except for the fact that his trademark sunglasses were shattered beside him and there were a few scattered telephone poles nearby. He was bloodied and beaten and there were scratches everywhere.
Izaya cursed under his breath. He knew Shizu-chan liked to get into fights often, but how the hell did he get this banged up?
He looked confused. "... Izaya? What are you doing here?" Shizuo managed to croak out, the bleeding getting even worse.
Out of instinct, Izaya dropped down to his knees and grabbed his head, trying to clot the blood still steadily flowing out. An extremely tiny voice inside of him told him that cradling Shizu-chan's head like that felt really nice, and he decided not to let go immediately.
"Simon, couldn't you have brought bandages or something like that along with me?" Izaya said, swiveling his head to glare at Simon.
He frowned. "I go get bandage now," Simon said as he took off running, hopefully in the direction of bandages. Izaya resisted the urge to facepalm and instead just gritted his teeth.
There was a brief awkward silence between the two of them, the only sound being the constant drip-drop of Shizuo's blood.
"Hey, Izaya. Marry me."
Izaya looked at him with a confused expression, even though his heart involutarily fluttered. "What? Shizu-chan, stop joking around. You're going to die of blood loss."
Shizuo snorted at him. He could see his temper starting to flare up, but he managed to push it back down. He reached into his bloodied coat pocket and shuffled around in it for a few moments. Finally, he pulled out a wedding ring.
"I'm not joking. Will you marry me, Izaya Orihara?"
It was clearly a pain to get the words out by now. And despite his efforts, the blood was still leaking out, making Shizuo a pale white color.
"Yes," Izaya breathed out. "Yes I will, Shizuo Heiwajima."
"I've always love you, you know," Shizuo said, right before his eyes fluttered closed for the last time.
Written for the NeonClan Biweekly Tumblr Contest! Prompt: Person A cradling Person B's head, frantically trying to stop their bleeding, when Person B suddenly asks A to marry them. When Person A tells them to stop joking around, B pulls a wedding ring out of their bloodied coat. The moment A says yes, Person B's last breath leaves them.