Elsif's Ride by SourPickleJuice

Quite the extreme, but awesome, large-insertion comic by SourPickleJuice on Pixiv.

Elsif was hired to clog a leak, she was no plumber, but it payed well, little did Elsif knew the leak came from a horse's cock, and she was going to be use to clog the leak, sadly, the owner of the horse had to travel to Hammerfell, so he dicided to take his horse and his sleeve with him, it was a long and bumpy ride, but they're half way there, sadly the war took them for a long detour, adding a week more to their journey, so Elsif's gonna be working all the way there, no breaks, according to the contract.