We're currently a handful of episodes deep into the TV anime adaptation of Ken Wakui's Tokyo Revengers manga, which has seriously felt the anime effect as far as sales are concerned. In fact, the manga has now sold 6.7 times the amount it did prior to the debut of the anime.
The recent tally puts Wakui's manga at 14.5 million copies printed physically and sold digitally, which is an increase of 4.5 million copies since the series announced its 10 million milestone on March 31. According to Kodansha, one volume was selling every 2.4 seconds during this period. In March, Oricon had the series down as the 9th best-selling series in Japan, and that ranking jumped to 2nd place—even putting it above Demon Slayer—in April.
Crunchyroll has been streaming the anime as it airs and sums it up below:
Takemichi Hanagaki is a freelancer that's reached the absolute pits of despair in his life. He finds out that the only girlfriend he ever had in his life that he dated in middle school, Hinata Tachibana, had been killed by the ruthless Tokyo Manji Gang. The day after hearing about her death, he's standing on the station platform and ends up being pushed over onto the tracks by a herd of people. He closes his eyes thinking he's about to die, but when he opens his eyes back up, he somehow had gone back in time 12 years. Now that he's back living the best days of his life, Takemichi decides to get revenge on his life by saving his girlfriend and changing himself that he'd been running away from.