Kirishima yelped and felt his head snap to the side as Dabi sent another blow to his cheek. He had been here for weeks, the villains catching him while he was home alone watching TV. They blamed him for Bakugo's escape and honestly,they weren't wrong. It was because of him and his friends that Bakugo had gotten out alive. He had just tried to escape, pulling at a loose link in the chains that cancelled his quirk and tearing them from the wall. He was almost out the door when Shigaraki had put 4 of his 5 fingers on his neck and threatened him with his life.

Thought I found a way
Thought I found a way, yeah (found)
But you never go away (never go away)
So I guess I gotta stay now

Oh, I hope some day I'll make it out of here
Even if it takes all night or a hundred years
Need a place to hide, but I can't find one near
Wanna feel alive, outside I can fight my fear

After Kirishima had been "Properly" bloodied and bruised, Dabi threw him by his throat into a tiny,metal cage they kept him in. He felt tears run down his face. He knew he wouldn't get out of here on his own. He wouldn't tell them anything. No matter what they did to him.

Isn't it lovely, all alone?
Heart made of glass, my mind of stone
Tear me to pieces, skin to bone
Hello, welcome home

Bakugo continued walking the streets,calling for his best friend. God,he hoped he was okay and just forgot to charge his fucking phone or something. He continued outside of city limits,hoping Kirishima had found somewhere else to live and just forgot to tell him. It was weighing on him. He hasn't eaten or slept in days,the worry proving to be too much for him.

Walkin' out of town
Lookin' for a better place (lookin' for a better place)
Something's on my mind
Always in my headspace

Kirishima groaned quietly as Toga finished her last cut, the villains simply too tired and busy to deal with Kirishima any longer. But they couldn't let him go,he had been there too long. He knew the area well, having nearly escaped so many times. He felt the last of his life force drain from him with his blood and closed his eyes,his last breath leaving him.
".....Katsuki....Now you'll be safe....I kept you safe.....I love you"

But I know some day I'll make it out of here
Even if it takes all night or a hundred years
Need a place to hide, but I can't find one near
Wanna feel alive, outside I can fight my fear

The pro heroes and all of UA gathered around the gravestone as Katsuki knelt before it, sobbing silently.

'Here lies Kirishima Eijirou. Beloved son,best friend and hero to all.'

Katsuki let out an agonised scream,the tears running down his face.
"Fuck! Kirishima- Eijirou- No! NO NO NO!"
He slammed his fists on the ground, vowing to get revenge for his fallen best friend. And love of his life.

Isn't it lovely, all alone?
Heart made of glass, my mind of stone
Tear me to pieces, skin and bone
Hello, welcome home.