This doujinshi is based around all the main characters of Suzumiya Haruhi no Yuutsu. While it contains no sexual acts, it makes up for it with an art style which closely mimics the original. Unless you know Japanese, this would not be for you as this is all story and not so much anything else.

Story:
The story revolves around the Save the world by Overloading it with fun Suzumiya Haruhi's Brigade (SOS for short) club's outing (where there is an extra girl character - I don't know her, at first I thought she is Kyon's sister but no way, she is too old, but it was long ago I last watched the original, so I may be wrong).
Kyon is hesitant to drink but as everyone gets drunk (except the extra girl) he is forced to drink a bit... mouth to mouth from Haruhi after quite a bit of beating, which is rather insane for my tastes.
He tries hard to leave the room but when he would succeed Nagato tells him that he cannot leave - she crated a confined space with only the room in it(see the original for details).
It ends with Kyon stopping in front of the door and the drunk girls closing up on him from behind with scary eyes.

Sexuality:
This is a slightly erotic doujin nothing more than a kiss from Haruhi and Asahina half-undressed and put in a strange position with flowers in her hands and her lingerie - Haruhi's idea for FlowerArrangment (as much as I can guess). That's all.

Art:
The art is good basicly, and as a doujin too - close to the originals. Characters are refined and detailed, emotions are alright.

Overall:
It's alright (though the insane fighting scenes are not needed, they are strange in such a mild erotic doujin). This is for those whom want some new story with their loved characters, a continuation of the original, instead of putting them in some sex-novel or something. I think it is good in itself though not a hentai doujin.