Obanai just finished off a weak demon slayer, only taking a single bite from their chest before giving a large piece to Kaburamaru and tossing the rest of the corpse away like trash. He was getting tired of these pathetic, standard slayers. He wanted to fight and eat something worthwhile, like a Hashira.

As he continued exploring, he stumbled upon a temple. It gave him weird vibes. In fact, it was more terrible than weird. Perhaps something in his pile of forgotten memories were flowing out again just at the sight of the temple. It looked so similar to his..."home."

He sneaks into the temple in hopes of finding a human or multiple, but he only found one thing. The thing that made his eyes widen in shock and made his body shudder for the first time in centuries. In front of him was a young child, no older than 5. They were locked behind a wooden cell and were wearing a dirty white haori. An all too familiar mixed scent of food wafted by his nose. He could barely move. This was how he lived before the life he was living now. The scent of the several dishes of uneaten food was sickening. No ventilation was present, and this just triggered Obanai's brain even more as he started sweating.

Slowly making his way to the cell, he reached out with a shaky hand, and settled it on the child's shoulder, startling them.

...

He can't believe that he was showing gentleness and pity towards a single, useless human being. But, he just can't stop himself. The memories of his human life replayed in his head. The same scenes matching everything the child is enduring. He can't leave the child here, so he broke through the cell, picked up the child, and ran out of the temple with them.