| Viral Hit | |
|---|---|
Manhwa cover of Viral Hit/How To Fight volume 1 | |
| 싸움독학 RR: Ssaumdokhak MR: Ssaumdokhak | |
| Genre | Action, Martial arts |
| Author | Taejun Pak |
| Illustrator | Kim Junghyun |
| Webtoon service |
|
| Original run | November 15, 2019 – 2024 |
| Volumes | 10 |
| Anime television series | |
| Directed by | Masakazu Hishida |
| Written by | Toshiya Ono |
| Music by | Yutaka Yamada |
| Studio | Okuruto Noboru |
| Licensed by | Crunchyroll |
| Original network | Fuji TV (+Ultra) |
| Original run | April 11, 2024 – June 27, 2024 |
| Episodes | 12 |
| Live-action television series | |
| |
| Viral Hit | |||||||
|---|---|---|---|---|---|---|---|
| Korean name | |||||||
| Hangul | ^싸움독학 | ||||||
| |||||||
| Japanese name | |||||||
| Kanji | 喧嘩独学 | ||||||
| Kana | けんかどくがく | ||||||
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Viral Hit (Korean: 싸움독학; RR: Ssaumdokhak, Japanese: 喧嘩独学, romanized: Kenka Dokugaku, lit. 'How to Fight') is a South Korean manhwa released as a free webtoon written by Taejun Pak and illustrated by Kim Junghyun. It has been serialized via Naver Corporation's webtoon platform Naver Webtoon since November 2019, with the individual chapters being collected and published into ten volumes as of June 2025.
The webtoon has been published in English by Line Webtoon since October 2022; and also published in Japan by Line Manga since April 2020. An anime television series adaptation produced by Okuruto Noboru aired from April to June 2024 on Fuji TV's +Ultra programming block. A Japanese-language live-action television series premiered on Netflix in June 2026.
The plot stars Yoo Ho-bin, a bullied high school student with a mother sick with cancer. One day, after a fight with one of his bullies, Woo Ji-hyuk, goes viral, Yoo Ho-bin decides to start a NewTube channel, and fight bullies to earn money. He learns how to fight with the assistance of a mysterious NewTuber with a rooster mask.

Created by Taejun Pak and illustrated by Kim Junghyun, the manhwa has been serialized as a webtoon in Naver's webtoon platform Naver Webtoon since November 15, 2019, and has been published in English by Line Webtoon since October 2022. It is also published in Japan by Line Manga since April 4, 2020.
| No. | Korean release date | Korean ISBN |
|---|---|---|
| 1 | July 31, 2021 | 979-1-19-122588-4 |
| 2 | February 15, 2022 | 979-1-16-769031-9 979-1-16-769065-4 (SE) |
| 3 | June 16, 2022 | 979-1-16-769134-7 |
| 4 | September 30, 2022 | 979-1-16-769169-9 |
| 5 | February 15, 2023 | 979-1-16-769193-4 |
| 6 | July 15, 2023 | 979-1-16-769231-3 |
| 7 | December 15, 2023 | 979-1-16-769284-9 |
| 8 | December 15, 2023 | 979-1-16-769285-6 |
| 9 | May 15, 2024 | 979-1-16-769298-6 |
| 10 | June 30, 2025 | 979-1-16-769358-7 |
An anime television series adaptation was announced on February 10, 2024. The series is produced by Okuruto Noboru and directed by Masakazu Hishida, with Toshiya Ono writing series scripts, Satomi Miyazaki designing the characters, Yutaka Yamada composing the music, and production handled by Slowcurve. It aired from April 11 to June 27, 2024, on Fuji TV's +Ultra programming block. The opening theme song is "Wild Boy", performed by MA55IVE THE RAMPAGE, while the ending theme song is "Viral Hack", performed by Crab Kani Club. Crunchyroll streamed the series.
| No. | Title | Directed by | Written by | Storyboarded by | Original release date |
|---|---|---|---|---|---|
| 1 | "First Upload" Transliteration: "Hatsu Tōkō" (Japanese: 初投稿) | Masakazu Hishida | Toshiya Ōno | Masakazu Hishida | April 11, 2024 |
| 2 | "I Have to Become Stronger" Transliteration: "Tsuyoku Naranakya" (Japanese: 強くならなきゃ) | Hitomi Ezoe | Toshiya Ōno | Masakazu Hishida | April 18, 2024 |
| 3 | "The Date" Transliteration: "Dēto" (Japanese: デート) | Masakazu Hishida | Toshiya Ōno | Masakazu Hishida | April 25, 2024 |
| 4 | "Humiliation" Transliteration: "Kutsujoku" (Japanese: 屈辱) | Masakazu Hishida | Toshiya Ōno | Masakazu Hishida | May 2, 2024 |
| 5 | "Friends" Transliteration: "Tomodachi" (Japanese: 友達) | Masakazu Hishida | Toshiya Ōno | Masakazu Hishida | May 9, 2024 |
| 6 | "The Devil" Transliteration: "Akuma" (Japanese: 悪魔) | Masakazu Hishida | Kakuzō Nanmanji | Masakazu Hishida | May 16, 2024 |
| 7 | "Special Training" Transliteration: "Tokkun" (Japanese: 特訓) | Masakazu Hishida, Yuki Iwasaki | Kakuzō Nanmanji | Masakazu Hishida | May 23, 2024 |
| 8 | "A Real Fight" Transliteration: "Jissen" (Japanese: 実戦) | Masakazu Hishida | Toshiya Ōno | Masakazu Hishida | May 30, 2024 |
| 9 | "Friends" Transliteration: "Tomodachi" (Japanese: 友達) | Yuki Iwasaki | Toshiya Ōno | Masakazu Hishida | June 6, 2024 |
| 10 | "A New Opponent" Transliteration: "Aratana Teki" (Japanese: 新たな敵) | Hitomi Ezoe | Kakuzō Nanmanji | Masakazu Hishida | June 13, 2024 |
| 11 | "A Tight Feeling in the Chest" Transliteration: "Mune ga Kurushī" (Japanese: 胸が苦しい) | Takahiko Kyōgoku | Toshiya Ōno | Masakazu Hishida | June 20, 2024 |
| 12 | "Joy" Transliteration: "Shiawase" (Japanese: 幸せ) | Masakazu Hishida | Toshiya Ōno | Masakazu Hishida | June 27, 2024 |
A Japanese-language live-action television series adaptation of the manhwa was announced by Netflix, with Myriagon Studio and Raku Film as the producing studios. The series premiered on June 11, 2026 on Netflix for six episodes.
In 2022, the webtoon was selected as a jury-recommended work in the manga section of the 25th Japan Media Arts Festival.
In Japan, Viral Hit garnered 460 million views and 2 billion in global by February 2024.
The anime series' first episode received negative assessments in the Spring 2024 season previews from Anime News Network critics. Richard Eisenbeis understood its premise was aimed at a specific demographic but was put off by Hobin being an "unlikable idiot" and the central character they are supposed to connect with. Nicholas Dupree criticized the overall production for being a "never-ending assault on the senses" and the "embarrassing writing" using the broadest strokes to create a story where its cast is "a twisted caricature of a typical anime stereotype". Rebecca Silverman was confident in the premise moving towards a positive direction with future episodes but criticized the mean and distasteful scenario Hobin gets into and the "spectacularly ugly" production, concluding that: "All in all, I can't think of a premiere I enjoyed less this season."
Anime News Network had two editors review the first manhwa volume in 2025: Bolts was critical of Hobin's circumstances being "a little too heightened and convenient" and bordering into "unintentional comedy" at points, but praised the narrative for delivering "great commentary on the dark side of content creation and bullying" and the character artwork striking "a healthy balance of realism and exaggeration", calling it "one of the more relatable webtoons that I have read. If you're familiar with content creation, as a creator or a consumer, you would get something out of this." MrAJCosplay called it a "modern day underdog story" that shows the "most relatable aspects of [our] modern society" and may hit too close for readers with similar experiences.