Mizushoubai (water business) is the term for Japan's night life activities, such as fuuzoku (similar to prostitution but none of the illegal bits), hosting and managing (entertaining at bars), and kyabakura (night clubs).
Recently, it was decided that a high school should be founded to educate the youth in these area where they'd previously had no such guidance: the School of Water Business, "Mizushou", located in Tokyo's Shinjuku ward.
The story is from the perspective of a teacher, Tanabe Keisuke, who was transferred there to help teach that school's first generation of students.
(Source: MU)

These are different stories involving Devilman's world. Some are about Devilman and add to the mythology some are separate stories that don't involve Devilman but take place the same time as the events in the original Devilman manga. They are illustrated by various artists. There are some color pages in the start middle and toward the end. There are some truly amazing art and stories in these volumes.

Number one is written and illustrated by Lazy Hagawari, Tatsuya Egawa, Katsuya Terada, Ken Ishikawa, Go Nagai and Shinichi Hiromoto.

Number two is written and illustrated by Hitoshi Iwaaki, Noriko Nagano, Go Nagai, Akihiko Takadera and Kazuko Yumeno.

Number three is written and illustrated by Noburu Miyama, Miki Toro, Shinobu Kaze, Sho-u Tajima, Masaomi Kanzaki, Yoshikazu Yasuhiko and Iou Kuroda.

Salad Days is a large collection of short love stories. Although almost all of them are unrelated some characters in previous stories reappear as a support character or as a main character if the author chooses to write more stories about the character.

The anthology features works by mangaka from "Ward" and "Comic Zero-Sum". A new volume is released every four months.

VOLUME 1: SHITSUJI (BUTLER)

1. Spider's Nest ~ Minekura Kazuya
2. Nice to Meet You, Young Lady ~ Kouga Yun
3. Holly Green and White Little Garden ~ Takayama Shinobu
4. The Situation of Goshogawa Yuzuru's Magnificant Mansion Creation ~ Miyamoto Fukusuke
5. Butler of Worry ~ Higashiyama Kazuko
6. Elevenses ~ Mikanagi Touya
7. The Incident of the Butler's Birthday Project ~ Saeki Yashirou
8. Le Droit D' Aimer ~ Haibara Yaku
9. Young Lady's Butler ~ Yoneyama Setsuko
10. The Melancholy of the Irritable Boy and Butler ~ Kikuta Yui
11. The Moon and the Visitor ~ Nanjou Tsugumi

VOLUME 2: REBEL AND PHANTOM THIEF

1. CANDY ~ Haibara Yaku
2. "...That Story." ~ Masaki Haruka
3. FLIES ~ Minekura Kazuya
4. Arabiana ~ Mizuhara Kenta
5. The Ancient History of the Three Thieves ~ Takayama Shinobu
6. The Adventure of Captain Arco Iris ~ Tsutsumi Shouko
7. SKYHIGH TENSION ~ Fujimura Ayumi
8. Mushroom and Kappa: Arcana compilation for thieves on business trips ~ Magami Guriko
9. The Lonely Mountain Robber ~ Tachibana Ayun
10. LANEKEEPER ~ Fujiwara Yuu
11. Moonlight Honey ~ Shindou Arashi
12. The Unlucky Pirate ~ Asada Yasuka
13. Strobo Rider ~ Kouzuki Reo
14. Moonlight Dance ~ Kouga Yun

VOLUME 3: PRINCE AND PRINCESS

1. Prince of Stars ~ Minekura Kazuya
2. Mushroom and Kappa: Arcana compilation for princes on business trips ~ Magami Guriko
3. Flower King ~ Kouga Yun
4. Rose Princess Destiny ~ Kinoshita Sakura
5. The Window of Rain ~ Takayama Shinobu
6. My Knight is a Princess ~ Kosugi Mayu
7. The Beggar Princess ~ Ueda Shinshuu
8. The Dawn Outside Heaven ~ D. Kissan
9. Princess Academy ~ Mikawa Verno
10. PRINCESESS ~ Kari Erika
11. Our Majesty's Tactful Words ~ Kisaragi Yoshinori
12. Heart-Racing Engagement Meeting ~ Saeki Yashirou
13. Listen to the Song I Sing ~ Mizutani Yuzu

VOLUME 4: VAMPIRE

1. The Vampire of the Sleeping Forest ~ Kinoshita Sakura
2. Mushroom and Kappa: Arcana compilation for vampires on business trips. ~ Magami Guriko
3. To Cross the River ~ Kouga Yun
4. A Shower in the Sunshine ~ Omote Sora
5. URBAN VAMPIRE ~ Bikke
6. Sky Burial ~ Takayama Shinobu
7. Today's Dining Table - Saeki Yashiro
8. The Aegis of Time's Coffin ~ Yugyoji Tama
9. Forest of Nobility ~ Kayase Shiki
10. CHIYOSAMA! Shindo Arashi
11. Strigoi Kingdom - Serikawa Mame
12. The truth of Catharsis ~ Inui Miku
13. Blood Donation Advice ~ Igarashi Ran
14. The Novice Vampire ~ Amamiya Azusa
15. Gentle Temperature ~ Kisaragi Yoshinori

VOLUME 5: JAPANESE STYLE / SAMURAI
1. Last Night's Rain Lifts ~ Minekura Kazuya
12. The Queen’s Dog ~ Araishi + Oshino
13. Kakure Oni ~ Mikanagi Touya
15. Miokuribana ~ Kikuta Yui

VOLUME 6: SPECIAL FORCES / TEAMS
2. Monach Sacred ~ SENO Tatsune & TAKAMIYA Aya
7. Frightening Eccentric ~ Sakamaki Yukisato
15. Twins Pocky ~ Serikawa Mame
16. Pledge of the Ox ~ Kayase Shiki

VOLUME 7: WIZARDS AND MAGICIANS
2. Night bird ~ Kouzuki Reo
5. Love Coloured Glasses ~ Bikke
6. The Kind Black Witch ~ Ueda Shinshuu
8. Kokonoe Kyuujutsu ~ Aoto Takane
11. Kashoku ~ Kayase Shiki
14.The Kind Magician and the Paper Bag Girl ~ Mizutani & Kaede

VOLUME 9: TRANSFORMATION / PERSONIFICATION

1. The Wolf and the 7 Baby Goats ~ Minekura Kazuya
12. Super Human Console ~ Shindo Arashi
14. My Blue Bicycle ~ Zekkyo
16. The Crow and the Pomegranate ~ Yoshizawa Tomoya

VOLUME 12: DEVILS & DEMONS
1. Demon’s Kiss ~ Inui Miku