(A/N: I finished watching the Demon Slayer and I finally understand why Rengoku is lovable and I'm so sad about his fate, so I wrote this as a tribute to a happier ending in an alternate modern world. I hope you enjoy~

P.S. This was inspired by my wonderful friend's idea)

He felt content although it felt as though he was fading. He wondered if he did right in the eyes of his late mother, and for a brief moment, he saw her smile profoundly acknowledging his great deeds. As his vision darkened, he knew he had died.

Rengoku awakens wide-eyed and beads of sweat cascade his face. He scans the darkroom gaining a sense of familiarity then realizing where he is. As he sits up to wipe away his sweat, you walk into your shared bed with a damp cloth and a glass of water. "You're up." You whispered. "You were having a bad dream. I tried to wake you up, but you were stuck in a deep sleep so I fetched you some water and cloth to wipe off the sweat." Still half asleep, Rengoku takes the glass with a soft smile. A characteristic that never seems to waver. "Thank you, darling." He cooed. Any time he praises you sends your heart soaring for he is the love of your life that pulled you from the shadows into the warmth of his light. "Y-you're welcome." You stuttered before sitting on the edge and dabbing the cloth across his face.

His amber gaze fixated as you work with such a gentle touch. His heart swoons, the tension withheld loosens remembering his position. He is safe, he is alive and well with you at his side. A wonderful reminder of his fulfilled life to have someone like you to validate his feelings. After a minute, you notice his loving gaze returning to his optimistic self. You blush taken aback. "Wh-what's wrong? Why are you looking at me like that?" Rengoku sets aside his drink to clasp your hand and pull you close into an embrace. "Thank you for taking care of me, for always thinking of me. I am sorry for making you worry. I'm am very fortunate to have you." His words of sweetness made your heart skip a beat. "Rengoku." Is all you could manage to say as you clasp his shirt, inhaling his scent. "I'm so lucky to have met you. Someone who supports me and keeps me out of trouble and is always at my side just as I always will for you."

You find the strength to pull away and cup his cheeks for a heartfelt kiss. His arms tighten around your waist as a hand holds the back of your head to deepen the kiss into a passionate one until the air is needed. "I love you." His smile grows tenfold. "I love you too (Y/n). Stay with me forever." He chirped. "I will." Rengoku lays you down for cuddles.