Owner:
https://www.pixiv.net/en/users/1763174

The text of the story are on the original posts. Here:
1 - https://www.pixiv.net/en/artworks/149208586
2 - https://www.pixiv.net/en/artworks/149279512
3 - https://www.pixiv.net/en/artworks/149463447
4 - https://www.pixiv.net/en/artworks/149465761
5 - https://www.pixiv.net/en/artworks/150133296