Saori Gotō (後藤 沙緒里 , Gotō Saori , born January 8, 1987 in Yokohama) is a Japanese voice actress and singer.
Hekiru Shiina (椎名 へきる , Shiina Hekiru , born March 12, 1974 in Higashikurume, Tokyo) is a Japanese voice actress and singer.
 Shiina debuted as a singer at age 17 in 1991.
 Her first voice role was Tenshiko in "K.O. Beast" in 1992.
 Some of her major voice roles include Hikaru Shidou in "Magic Knight Rayearth", Alpha in "Yokohama Kaidashi Kikō", Ami Chono in "Girls und Panzer", Tenjōin Katsura in "YAT Anshin!
 Uchu Ryokou", and Celestia in "".
 In video games, she provided the voice for famous Capcom mascot Mega Man in "" and "" and Pastel in the "TwinBee" games.
 Shiina is associated with Arts Vision, a major agency for talent in Tokyo, and was working under Sony Music Records, her record label until 2009, when she changed over to Lantis.
"Maho Girls PreCure!
" is the thirteenth anime television series in Izumi Todo's "Pretty Cure" franchise, produced by Asahi Broadcasting Corporation and Toei Animation.
 The series follows a girl named Mirai Asahina and a magician named Liko Izayoi, who both attend Magic School whilst also becoming the Maho Girls Pretty Cure to fight off the evil Dokuroxy.
 The series aired on ABC in Japan between February 7, 2016 and January 29, 2017, replacing "Go!
 Princess PreCure" (Later replaced by Kirakira PreCure a la Mode) in its initial timeslot.
 For the first 21 episodes, the opening theme song is "Dokkin Mahōtsukai PreCure!"
 (Dokkin♢魔法つかいプリキュア!
 , Surprising Maho Girls PreCure! )
 by Rie Kitagawa while the ending theme is "Cure Up RaPaPa!
 ~Hohoemi ni Naru Mahō~" (CURE UP↑RA♡PA☆PA!
～ほほえみになる魔法～ , Cure Up RaPaPa!
 ~Magic That Turns Into Smiles~ ) , performed by Rie Takahashi and Yui Horie.
 From episode 22 onwards, the opening theme is "Dokkin Mahōtsukai PreCure!
 Part 2" (Dokkin♢魔法つかいプリキュア!
 Part 2 ) by Kitagawa, while the ending theme is "Mahō â la Dōmo!"
 (魔法アラ・ドーモ!
 , Magic â la Thank You! )
 by Takahashi, Horie, and Saori Hayami.
 The ending theme for episodes 38 and 39 is "Tadashī Mahō no Tsukaikata" (正しい魔法の使い方 , The Correct Way to Use Magic ) by Mayu Watanabe.
Saori Hayami (早見 沙織 , Hayami Saori , born May 29, 1991) is a Japanese voice actress and singer.
 She is represented by the agency I'm Enterprise.
 As a singer, she is signed to Warner Bros.
 Home Entertainment Japan.
 In 2016, she won the 10th Seiyu Awards for Best Supporting Actress.
 Her major voice roles include Yukino Yukinoshita in "My Teen Romantic Comedy SNAFU", Ayase Aragaki in "Oreimo", Shirayuki in "Snow White with the Red Hair", Miyuki Shiba in "The Irregular at Magic High School", Shinoa Hiiragi in "Seraph of the End", Urara Shiraishi in "Yamada-kun and the Seven Witches", and Shōko Nishimiya in anime film "A Silent Voice".
Yukari Tamura (田村 ゆかり , Tamura Yukari , born February 27, 1976 in Fukuoka Prefecture) is a Japanese voice actress and singer affiliated with Amuleto, formerly Arts Vision and I'm Enterprise.
 Affectionately called Yukarin by her fans, she is also known for her high-pitched voice and interest in Lolita fashion.
 She debuted as a voice actress in 1997, releasing her debut single "Yūki o Kudasai" on March 26, 1997.
 Several of her releases have been used as opening and ending themes for anime series, while some have reached the Oricon top 100 singles and album charts.
 Her role as Nanoha Takamachi in the "Magical Girl Lyrical Nanoha" series contributed to a rise in her popularity, as several of her singles ("Little Wish: Lyrical Step", "Spiritual Garden", "Hoshizora no Spica", "Beautiful Amulet") were used as the ending themes for the franchise's anime adaptations.
 Besides "Nanoha", she voices the title characters Haruka Minazuki / Red Angel in "Kaitō Tenshi Twin Angel", Ringo Kinoshita in "No-Rin", Yamada in "B Gata H Kei", and Kaoru Tsunashi in "I Can't Understand What My Husband Is Saying".
 Other major voice roles in anime include Ranpha Franboise in "Galaxy Angel", Mai Kawasumi in "Kanon", Mei Sunohara in "Clannad", and Saku Tōyama in "Tantei Opera Milky Holmes", Rika Furude in "Higurashi When They Cry", and Tenten in "Naruto".
 In video games, besides the ones that were adapted into anime, she voices Talim in "Soulcalibur" and Myao in "Marl Kingdom".
 In tokusatsu, she is known for her voice role as Navi in 35th Super Sentai Series, "Kaizoku Sentai Gokaiger".
Saori Ōnishi (大西 沙織 , Ōnishi Saori , born August 6, 1992) is a Japanese voice actress from Chiba Prefecture.
 She is affiliated with I'm Enterprise.
Mushoku Tensei: Isekai Ittara Honki Dasu (無職転生 ~異世界行ったら本気だす~, literally Jobless Reincarnation: I Will Seriously Try If I Go To Another World) , is a Japanese web novel series by Rifujin na Magonote and is published on internet web novel website Syosetu.
 It was serialized between November 22, 2012 and April 3, 2015.
 A year later, it was announced the series would receive a light novel release under Media Factory's "MF Books" imprint; the illustrations are done by a Pixiv user called SiroTaka .
 A manga adaptation by Yuka Fujikawa began serialization in the June 2014 issue of "Monthly Comic Flapper".
 Seven Seas Entertainment licensed the "tankōbon" volumes of the manga for localization in North America.
 On Syosetu's rankings, the web novel has made cumulative appearances as the most popular work on the website.
Saori Seto (世戸 さおり , Seto Saori , born September 3, 1982) is a Japanese voice actress from Saitama, Saitama Prefecture, Japan.
 She was affiliated with Mausu Promotion until 2014.
Takako Ohama (大濱 貴子 , Ōhama Takako , born January 9, 1963 in Tokyo) , better known by the stage name Rei Igarashi (五十嵐 麗 , Igarashi Rei ) , is a Japanese actress and voice actress who works for Office Osawa.
 She is married to fellow voice actor Shō Hayami, and is the mother of the Japanese voice actor Hideyuki Hayami.
The Irregular at Magic High School, known in Japanese as Mahōka Kōkō no Rettōsei (魔法科高校の劣等生, lit.
 "The Poor Performing Student of a Magic High School") , is a Japanese web novel series by Tsutomu Satō.
 It was published on Shōsetsuka ni Narō, an internet web novel website, between October 2008 and March 2011.
 Satō reached a deal with Dengeki Bunko and began releasing his work in a light novel format beginning July 2011.
 In 2013, each story arc received a manga adaptation with varying manga artists and publishers.
 That same year, an anime adaptation by Madhouse was announced and was broadcast between April and September 2014.
 "The Irregular at Magic High School" franchise had been localized for English by two companies: The light novels and one of the manga adaptations are licensed by Yen Press while Aniplex of America licensed the anime series.
 The anime series was simulcasted on four networks, and was later made available on Netflix.

Question: Saori Hayami, a Japanese voice actress and singer, had a major voice role in what web novel series, also known in Japanese as Mahōka Kōkō no Rettōsei?
Answer: The Irregular at Magic High School