Well this pack actually don't do much alone, but you can download the Datapack in conjunction with this in the following link:
Personal Waifu [DP]<====(CLICK AQUÍ)
In there you have more explanation about what it does exactly.
IMPORTANT:
If you actually download the two files i have to tell you a little thing first, and that is that by default the skin that comes in this resourcepack is Alex's and if you want to customize it and put the girl you love the most, just download a skin (64x64) ALEX FORMAT, rename it - put it: waifu. Now with winrar go to where it says assets \ minecraft \ textures \ item in the zip, paste it there and you are ready to go ;D.
Well you are free to distribute this pack, but only share this link of curse, don't download in other pages or websites!
This is done just for fun, the model and textures are made by third parties THEY ARE NOT MINE.