From Yaoi Otaku Translation:
The sequel of Okamoto x Shiragane.

Hanamura Masatsugu and Takakura Kuniomi are intimate friends since childhood, and both are heirs to their respective marquises. Their favorite sport is seeing who can score the next bishounen that comes across their path in the Imperial Capital. And now Kuniomi has set his eyes on a new target…!?

Who would be the winner between these two beautiful men’s quest for love—?!

A lavish Taisho* Romanesque edition!! (*** Taisho era: 1912-1926 ***)

1) A Beast's Pure Love College student Takafumi is kidnapped by mob boss Kidou. Takafumi is imprisoned on Kidou's estate, and is tied up and sexually harassed every day. Will he ever escape? 2) A Confused Heart Spoiled rich boy Tsubaki is used to getting anything he wants-but has he met his match in Sonoda, the new professor?

From Fantasyshrine:

Okano-sensei, a high school teacher, was sexually molested by a pervert in the train on the way to school. As fate would have it, his student, Tokiwa, witnessed the whole incident. He then threatened to expose Okano for having a fetish of being groped by a man unless Okano agreed to be Tokiwa’s sex slave! In shame, Okano succumbed to the pleasure only Tokiwa could provide…

From Yaoi Otaku Translation:

...The young ikemen who pretends to be a faithful dog turns out to be
a carnivorous beast..!?

Shuuji is a salary man, who is a crazy-about-idols otaku. He has always been selfish when it came to his childhood friend, Tomoya. But one day, the always faithful dog, Tomoya, suddenly had his button pushed...! (he seems to be capable of very passionate kisses). However, Shuuji, who always has seen Tomoya as nothing more but a childhood friend, gets the 'doki-doki' thump in his chest ; yet it's because of a male..!? A love case where the ever so submissive, faithful dog turns out to be carnivorous. The start of a new pornographic love~!

1-4+Extra) Tomoharu Okabe is starting to work as an illustrator for a popular sensationalist novelist, Tougo Tsubaki. Since Okabe-san is not an established mangaka yet, he is persuaded to illustrate for Tsubaki-sensei. However, this assignment with Tsubaki-sensei ends up more than he ever bargains for.

5-6) Shy Candy, Wanton Candy