Vampyre, Knights and Boobs

Vampyres, Knights and Boobs (、騎士、おっぱい, Vanpaia, Kishi, Oppai​​​​, alternatively read as Vampires, Knights and Tits) is a light novel series written by Midorime. As of now a total of 29 volumes available as of March 20, 2018.

Story Arc
Midorime has grouped the light novels into various story arcs. The first arc, titled Pendragon and Karnstein (, literally meaning Hero Brother and Vampyre Sisters), ran through the first four volumes. The Longinus (ロンギヌス, Ronginusu) is the second story arc and follows volumes five through seven. Yggdrasil Kings (ユグドラシル王. Yugudorashiru-ō) follows volumes eight through fourteen. The fourth arc, Seven Deadly Sins (七つの大罪, Nanatsunotaizai), starts at volume fifteen though twenty-four. The fifth arc, Revelation's Commandments (黙示録の十戒, Mokushiroku no jikkai) starts at volume twenty-give and is the series' current arc.

Development
Midorime had been reading light novels with harem, demonic, supenatural and ecchi-themes to them such as High School DxD and The Testament of Sister New Devil, prior to the publishing of the first light novel for Vampyre, Knights and Boobs. His main character, Arthur, was made to bring the legend of King Arthur into the story, and is ment to act as a fusion of the main characters of High School DxD Issei Hyoudou and Testament of the Sister New Devil Basara Toujou. For the first volume, he made Mina a second lead character and heroine, and Elaine to be the second heroine. Some of his characters are loosely referenced from the Bible, non-fiction books, folklore, mythology and other manga and light novels. He created a world where the war between the five main factions (Vampyres, Demons, Seraphs, Fallen Angels and Heroes) is over. He also added characters and legendary beasts from a variety of places from Norse mythology to Japanese Yōkai. The concept of Overdrive were to represent a super-powered version of the character's Boosted Pump and Incinerate Anthem, and likens this to the Balance Breaker in High School DxD, the Super Saiyan in Dragon Ball and the Bankai in Bleach.

Midorime intended to make the shounen-style light novel series one that teenagers would be embarrassed to buy, yet was concerned that it might get an age restriction. In each of his afterword sections in the light novels, he makes numerous references to and also agrees with the appeal of Very Sexual Themes and oppai (breasts), demonstrated in volumes of the light novels, and had planned to make the heroines more erotic, especially in the side story volumes that focus on comedy.

Light Novels
Vampyre, Knights and Boobs began as a Japanese light novel series written by Midorime. The first volume was released in Japan There are currently twenty-nine volumes available.