Hiroki Adachi (安達浩樹 Adachi Hiroki?), also known as HERO, is the original author of Hori-san to Miyamura-kun. She published the webcomic from 2007 to 2011, doing both the story and art. The webcomic was readapted into a new, ongoing manga serialized in Monthly GFantasy and titled Horimiya, with HERO returning as the writer and Daisuke Hagiwara doing the artwork.
|“||I'm grateful to have been offered a chance to have my webcomic turned into a manga. It's surprising how much the impression of it can change with just a different artist! The story seems so much more understandable! Miyamura seems so much sexier! It's bringing back the feelings I had when I first started drawing it, and I hope that I'll be able to enjoy it just as much as a reader now!||”|
—HERO, Volume 1
In 2008, HERO begun serializing Asao-san to Kurata-kun (浅尾さんと倉田くん Asao-san to Kurata-kun?) in Gangan ONLINE. It ran for a total of eight volumes, ending on May 15, 2014 with the final volume releasing on June 21, 2014.
From 2010 to 2015, Hero Kojin Sakuhinshuu (ＨＥＲＯ個人作品集 Hīrō Kojin Sakuhinshū?), a collection of HERO's works, was released. It consists of nine volumes:
- 7 to Usotsuki Online (7と嘘吐きオンライン 7 to usotsuki onrain?), released October 22, 2010.
- Koukan Note wa Shaberanai (交感ノートは喋らない Kōkan nōto wa shaberanai?), released August 22, 2011.
- Pattern Sono 1 Dame Ningen (パターンその１駄目人間 Patān sono 1 dame ningen?), released December 22, 2011.
- Subete no Kibou ni Yell o (すべての希望にエールを Subete no kibō ni ēru o?), released April 21, 2012.
- Apartment ni Sumu Shounen (アパートに澄む少年 Apāto ni sumu shōnen?), released January 22, 2013.
- Ukiyo Memo no Yume ni, Oni (浮世メモの夢に、鬼 Ukiyo memo no yume ni, oni?), released October 26, 2013.
- Asenai Shian no Shoujo A (褪せないシアンの少女A Asenai shian no shōjo A?), released June 21, 2014.
- Utsumuku Oto wa Rin to Shite (うつむく音はリンとして Utsumuku oto wa rin to shite?), released May 27, 2015.
- Yoake wa Kizu no Ato (夜明けはキズのあと Yoake wa kizu no ato?), released November 27, 2015.
Starting October 2011, HERO began collaborating with Daisuke Hagiwara on a spin-off of HERO's Hori-san to Miyamura-kun webcomic, titled Horimiya, with HERO working as the writer and Daisuke Hagiwara as the artist. The manga is currently ongoing and is serialized in the GFantasy magazine, published by Square Enix. Later on, Yen Press licensed the story in English. Currently, the series has fifteen volumes.
HERO illustrated Youth Divorce (青春離婚 Seishun Rikon?), written by Iduki Kougyoku, in 2011. The series ran for one volume, which released in 2012.
On May 22, 2012, the Daily Lives of High School Boys Anthology (男子高校生の日常アンソロジー Danshi Kōkōsei no Nichijō Ansorojī?) was released alongside Volume 6 of Yasunobu Yamauchi's Daily Lives of High School Boys. It included contributions from various mangaka, HERO and Daisuke Hagiwara included..
In 2012, HERO began releasing bonus volumes of the original webcomic, titled Hori-san to Miyamura-kun Bonus (堀さんと宮村くん おまけ Hori-san to Miyamura-kun Omake?). The first volume was released on July 21, 2012.