Hayate × Blade

A bell is struck by Shizuku Miyamoto to signal the start of fighting, after which it is struck again every three minutes. Duels are to cease after the bell rings for the fifth time. Therefore, each bout takes place within fifteen minutes. Participants are allowed to fight multiple teams, both successively and concurrently. However, in the case where a student has certain opponents in mind, certain applications need to be made for the challenge. When a team applies to take on multiple teams in one concurrent duel, they are expected to defeat all of them, or have the same number of points as that of all opponents in total deducted if they fail to do so.

Teams generally duel in pairs with each partner using one sword, though as of volume three, an exception is made for Jun Kuga, who fights with two swords. Each team is divided into Heaven (天, Ten) and Earth (地, Chi). Though there is no major difference in their actions in actual battle, the "Heaven" and "Earth" are usually considered to take the offensive and the defensive respectively. The "Heaven" will have her star attached to her left shoulder and the "Earth" will have her star concealed (this is known as the Shadow Star (影星, Kageboshi)). If the "Earth" has her Shadow Star hit, she will be unable to continue fighting. Striking the star of an opponent "Heaven" is the only way to achieve victory. However, the student of a role can only strike the star of the opponent with the same role, otherwise, the strike is considered invalid. A victorious team receives 50,000 yen as a reward, which is apparently increased for higher-level duels.

On special occasions, such as during the sports festival, winning results in a team receiving double the usual number of points. These days are known as a W Up (ダブルアップデー, Daburu Appu Dē, Double-up Day). When a student has zero stars, she will have to forfeit her status as a Sword Arts student. However, she is allowed to make her challenge one more time. The process is known as "Revenge" (リベンジ, Ribenji), and such students do not get financial rewards even when they win. The use of any weapons outside the stipulated sword is banned, though there has been at least one occasion when this rule is bent. Also, teams A-ranked and above are allowed to modify their weapons. Breaking rules can result in points being deducted from a team, with harsher punishments like confinement for severe offenses. Other known violations are the unsheathing of swords for non-regulation reasons and using modified weapons outside stipulated areas.

The lowest shown rank is D, followed by C through A, then "Special A" and S. Rising in rank earns a team 1,000,000 yen. Students under the rank of A are restricted from entering designated areas of the school that only those A-ranked and above can enter, presumably for their safety. Little is known of these areas, as they are blocked by walls and guards. S-ranked students are part of the student council—the "S" is said to stand for "Student Council" (生徒会, Seitokai). Council members wear a uniform distinctly different from other students, and have been shown carrying out duties such as planning events. Duels for the position of student council president have more complicated rules. These duels are limited to council members only, with the defeated party given a choice between an unlimited number of future challenges or to forfeit their sword-bearer status.

Teams are referred to as sisters-in-arms (刃友, shinyū), while the relationship between two partners is also addressed as such. The term sounds similar for that used to describe close friends in Japanese, shinyū (親友). Two students enter a pact via an application to the school administrative staff and exchanging the rings attached to the hilts of their swords. This is seen as a deep commitment much like the "marriage" that it symbolizes, and there have been occasions when sisters-in-arms are called "husband", "wife", or some variation thereof.

When the pact between sisters-in-arms is dissolved, the number of stars they had gained up until that point is divided equally among them. On the other hand, if two students enter a pact with different numbers of stars, their ranking is also affected. A lower-ranked student pairing up with a higher-ranked student will have a higher position due to the greater average of points earned as compared to a team of the same rank. The opposite applies if a student is higher-ranked than her new partner.

Hayate × Blade began as a manga series written and illustrated by Shizuru Hayashiya which started serialization in ASCII Media Works' shōnen manga magazine Dengeki Daioh on November 21, 2003 and ran in that magazine until May 21, 2008.[2][3] The manga restarted serialization in Shueisha's seinen manga magazine Ultra Jump on August 19, 2008,[3] and continued until July 2013. The reason for the switch was not explicitly explained, but the reason given was due to "various circumstances". Eight tankōbon volumes were released in Japan by ASCII Media Works under their Dengeki Comics imprint between June 26, 2004 and January 26, 2008,[4][5] though Shueisha republished the eight volumes under their Young Jump Comics imprint featuring new covers, new character descriptions and revised panels. Shueisha published the remaining 10 volumes through volume 18 between December 19, 2008 and September 19, 2013. Seven Seas Entertainment licensed the manga for release in English,[6] and the first six volumes were released between November 2008 and April 2010.[7] As a result of the change of magazines in Japan, Seven Seas Entertainment lost the rights to continue publishing further English-language volumes of the manga series. A sequel manga, Hayate × Blade 2, began serialization in the September 2013 issue of Ultra Jump.

Three drama CDs based on the manga series were released by Frontier Works in collaboration with Geneon between March 24, 2006 and May 21, 2008.[32] Bonus tracks are included on each CD, where the voice actors talk while out of character. Also, the booklets for the drama CDs have short, presumably non-canon strips by Shizuru Hayashiya. The first drama CD covers the events of the first manga volume, plus two extra tracks covering original material. The second drama CD covers major events during the school festival. The third drama CD features original material, with most recurring cast members being voiced in at least one track.