Honjitsu Wa Zenra Toukoubi (“Today Is A Naked Schoolday!”) [English], by Guglielmo
Oh, that story was gold, original, creative, crazy WTF comedy
In the universe of Honjitsu Wa Zenra Toukoubi, highschoolers go to school naked once a year and it’s no big deal at all. The female heroine wakes up in a super-stereotypical way (late bird, gets naked for naked school day, exits house running with a slice of toast in her mouth), and it’s only when she arrives at school she realizes she got the date wrong, woops.
I’m not spouting any more details (until now, those were the pages 1-5), you’ll have to find out the rest yourselves. It will include comedy, tsundere, your dose of WTF, and good happy sex
We owe this unique release to Artfish, thanks a lot!!
By the same artist, I also share Shishunki Marudashi (246 pictures) and Hokentaiiku Jisshuu Jugyou ~ Onnanoko no Karada no Shikumi Hen.
And now, the download & gallery links 
Open the Complete Pictures Gallery
Download the Free Hentai Manga in a Zip file
(22 MB, 31 pictures, English)
My occasional rant about excessive file sizes: I downloaded it myself as a 66 MB archive, but that was pointlessly huge. A simple recompression not making any difference to the naked eye, and now it’s only 22 MB for you
Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2 – or – Zip Mirror #3
“Penis is not the answer.” There’s a bumper sticker slogan.
C