Even though J no Subete is 3 volumes long, each volume is a dynamic story in itself covering a particular stage of J's life. His life is a dark story and it's a very psychological manga.
Book 1 is about all of J's trials and tribulations throughout childhood, during highschool as he tries to find his place in the world and when he meets the somber Honor student Paul...
Timeline (from Oriolidae & Sparviero):
01 Barairo no Hoo no Koro v01 ch01-05
02 J no Subete v01 ch01-05
03 2 Shuukan no Adventure v01 ch04-07
04 J no Subete v02-03
05 Barairo no Hoo no Koro v01 Extra

Contains 4 short stories, including an extra from Barairo no Hoo no Koro

In the Anata no Tame nara doko Made mo series:

V.1 - Anata no Tame nara doko Made mo

? Anata no Tame nara doko Made mo
Detective Takachiho Takumi had finally caught the elusive criminal Nanami Youichi after chasing him all the way to a remote island. But what will happen to the pair of them when they accidentally miss the ferry home?

? Magical Butler

? Non-non
Ishimaru and Yamada have been friends since the beginning of high school. Yet the closer they get, the more... awkward their friendship becomes!

? Non-non no Nochi

? Non-non-non

? Extras

V.2 - Naraku Izuko Emaki (Picture Scroll of Somewhere in Hell)
From Yaoi Is Life:
Anata no Tame nara doko Made mo: Heian Style Special

The serious and straight-laced government official of the Capital and Officer in the Right Division of Inner Palace Guards, Takachiho no Takumi, just can't ignore the annoying fake onmyouji, Nanatsumi no Hirokazu, who keeps hitting on him. And now he's forced to work on an accident involving ayakashis! But for the pervert Nanatsumi, he uses every chance he has to turn the situation into a dirty one!

The Butler Tsuruhami tries to turn away a door-to-door salesman, but it won't happen that easily...

The secrets under the uniform, that none of the classmates knows.

A black-and-white oneshot about an awkward couple.
(Source: Anonymous Delivers)

In a certain kingdom, there are pair of royal twins who are fated to be unable to live without one another.

Full color and black & white art collection. Included extra story.

It's a very short but sweet oneshot about an artist and her portrait model.

From Aestheticism:
The story happens in a circus in Paris in the 1970's. (...) Much is made of the romance of the circus atmosphere, of flying through the air on a trapeze, etc etc. Think cirque here, not circus. We're doing Old World riffs on the romance and tawdriness of the ring. There are no elephants in tutus walking on their hind legs; it's slit-eyed jugglers and daring death-loving trapeze artists and sad Pierrot clowns, even if the Pierrot clown - our hero, Torinosu, 'Bird's Nest' - has a false red nose. The tawdriness comes from the circus master pimping out his performers to anyone willing to pay. (...) And there's tanbi decadence - ghosts who wander into the action looking like teenaged girls even if they're the hero's brother, and abandoned neurotic women with a thing for inflicting pain, and buracon and possible murder and unspoken pining and a hero who looks about to perish at any moment from terminal angst.