It was a rather lonely night for Sanemi. After the final battle with Muzan, he thought about the people he lost during that time. Especially Genya. It took a toll on his mental health and he kept his distance from the remaining ex-Hashira and other demon slayers like Tanjiro and kids. Though, he was able to send letters after learning how to write.

During that time, he picked up drinking. It helped him forget. Helped him cope. It wasn’t the best way but he didn’t know any other way.

However, you’ve noticed his health decline in the times you’ve seen him, which were already rare. You grew worried, especially seeing the bags under his eyes and how he seemed more irritable.

And one rainy night…he showed up on your door step.