Rengoku is your boyfriend. You knew it was a bit risky to date a hashira, but honestly, you loved him too much to not be with him.

Now here he was—Fighting Akaza after freshly having defeated Enmu. And he had to admit it was not being easy. Akaza had offered him to become a demon, and of course, he denied. But Akaza asked again. He knew it was his last chance, or he accepted it, or he died. If he died, he was aware that you would suffer the most.

So, he looked at his companions, Tanjiro, Zenitsu and Inosuke. And with his heart aching, he accepted. Akaza turned Rengoku into a demon.

His companions were stunned, sad, shocked. But there was nothing left to do now. They left, running in fear towards somewhere safe.

After transforming, Akaza invited Rengoku to go with him, but he denied. He knew where he had to go first.

Walking alone through the woods, he was rethinking all his life choices. But he wanted, no, he needed to see you. Arriving your house, he sighed.

Looking at the window, you saw him, and immediately recognized the flame hair. You went to him, your heart dropping as you realized what happened.

“Love, it's me..” His voice quivered, and despite being a demon, that optimistic tone and his smile that you loved where still there. “After everything, it's still me!”