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The name of the manga is "Teacher is my toy"

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Not sure if posted before. I know it's Nanako, but can't seem to find anything on it.

It's from the doujin "Lets Bikiniing!" by Kawara Keisuke. It can be found over at g.e-hentai or through a google search.

On the topic of Kawara Keisuke, it looks like he has a new series of Nanako being released titled "Nanako-san Teki na Nichijou Revival". It seems to be a re-release of the original Nanako-san Teki na Nichijou, but knowing how Dash!! had a few special chapters, there might be something hidden within the two volumes released so far, but it's difficult to know at the moment.

Kono Yo wo Hana ni Suru Tame ni is also being updated with 7 volumes at the moment. We have access to the first 5 volumes, but some tasty screenshots from volume six were released some time back and it would be awesome to see how these situations started.

In fact I only posted 4 volumes of kono Yo wo Hana ni Suru Tame ni, I couldn't find any other chapter online

Does anyone know where these images are from?

Volume 5 was leaked at one point on 4chan about half a year ago but eventually became difficult to find again. Luckily I managed to archive the first five volumes before that happened so you're in luck. Compared to the first 4 I didn't find much in terms of over the top nudity outside of a few topless scenes, but 6 seems to have made up for that quite a lot.

Outdoor Soap play or Okugai de Soap-Ru Joukan, it's a doujishin from to love ru that can be found in g e-hentai

Gargantia I think
 

The art is by OHMI Takeshi

I want to know the manga or artist for this one.