BL - Yakuza/Mafia

Doctor Hitomi x Good-Natured Ito
Potter with Amnesia Daiki x Town Chairman Sabato
Ex-Yakuza Youmei x Devoted Dog Hizuru
Yakuza Kiriya x Lawyer Zaizen

Prequel to Rouge
At 14, Yukio became devoted to yakuza heir Yamato after he unwaveringly declared he will be the one to take the group when his father, the current boss who is dying of cancer, passes. Now 17, Yukio is still as devoted to the resolute Yamato, but his feelings are more complicated than before.

Shimojou had alway been at the top, but in high school he finally tasted defeat when he lost to Kuze. He vowed to be the one to bring his new rival down. Now, Shimjou is a yakuza, and bored with everything, he's looking a plaything. When Shimoujou finds a filthy man being mugged in an alley, he turns out to be his former rival Kuze and Shimoujou takes in the good for nothing Kuze. But, he finds out Kuze is actually an undercover detective.

College student and bartender Ogiwara is threatened after suddenly being told he's the guarantor for his friend's 5 million yen debt. He is saved by a regular customer and yakuza head Kurose, who fully pays off the debt. In exchange, Ogiwara must become Kurose's toy and reimburse him with his body.
Includes: Police officer Tsubaki going undercover and becoming Kajiro's right hand.

Tsubaki is a police officer who had gone undercover to infiltrate Kajiro's yakuza group, but is discovered by Kajiro. However, Tsubaki switches sides after Kajiro accepts Tsubaki's innate violent nature, saying they are both abnormal. Now, Tsubaki has become attached to Kajiro like a possessive dog, but he is unable to understand him, so he begins trying to find out more.

Detective Issei approaches yakuza Suguru at a bar in hopes of making him an informant for Issei investigation into Suguru's group. Suguru, annoyed by Issei, offhandedly agrees as long as Issei blows him and lets Suguru top him. Willing to do anything for justice, Issei is unperturbed by Suguru's conditions. As Issei exchanges his body for information from Suguru, they become hooked on each other.

Ch. 6: Takumi is taken in by Kouta after he's found lying in the street. Kouta falls for him, despite his concerns Takumi might be a yakuza's woman

Pg. 76-107: After he sees them leaving the storage locker together, new math teacher, Suga, tries to help his student Rin, concerned he's being bullied by rumored yakuza student Ryuujin, but ends up finding out Rin's secret instead

Ch. 4: In prison, yakuza Murase unknowingly reunites with Yuu, a child he had once saved from the director of their orphanage's abuse

Ch. 1: Cop Asuma is order to get information from yakuza Yotsume, his college kendo kouhai. However, Yotsume, a masochist, likes making Asuma angry until he hurts him