Sorry, need help again! Instagramers doesn't put title name so i need help to find these manga -cries-

It's Watanabe Asia work for sure, but i've been searching but still can't find it.

***Here's the link to the picture:
http://zlynnaa.tumblr.com/post/107813026058

Here's others that i need help:

1. http://zlynnaa.tumblr.com/post/107814421888
2. http://zlynnaa.tumblr.com/post/107814624288
3. http://zlynnaa.tumblr.com/post/107815310798
4. http://zlynnaa.tumblr.com/post/107816757883
5. http://zlynnaa.tumblr.com/post/107816890198

Thanks for the help!

1. Google search says it is a novel, but I can't find it on Baka Updates. If you google "罪な回想 (novel's name) 陸裕 千景子 (author's name)", you will see the book cover.
2. Looks a lot like KOUSAKA Akiho artwork.
3. By SAKURAGI Yaya,maybe Mizu no Kioku?
4. Bara to Yaban probably. If not, it's from the same mangaka.
5. Looks like it is from a novel, one-page sex scene...

Sorry if I didn't not help that much.

Wow! Thanks! You're awesome! Just left with the Watanabe Asia work that i've no idea where it's from.

The Watanabe Asia screengrab is from Cornichon.

Thanks a lot!