A Unexpected Love

Rengoku is sent out on a mission to take down a demon north of the demon slayers corps building. The Master tells Rengoku to take Tanjiro with him, for this demon has a really faint smell. Tanjiro agrees to go on the Journey, but struggles to leave his sister behind, due to the Masters orders. Tanjiro learns more about the Flame Hashira on the Journey, and his feelings of admiration grow into something more.... meanwhile Rengoku focuses more on their mission, But soon, Tanjiro's survival becomes more important to Rengoku than the Mission, and soon, something goes on between them, something that changes their relationship forever.

(this may include just a little 18+ and above aka sex. I'll have a warning at the top of the chapter if you wish to skip it, and also this takes place before Mugen Train! Hopefully, this isn't to confusing for you)