On the Twitter account of the anime adaptation of “Masamune-kun’s Revenge” (jap.: “Masamune-kun no Revenge”) it was announced that it will receive a second season.
Masamune-kun’s Revenge Season 2: Details are still pending

Concrete details about the sequel, such as the members of the production team or a date for the broadcast, are still pending. As usual, we will keep you up to date. A first teaser for the announcement can be seen below.
The twelve-episode first season, which aired in the spring 2017 season, was directed by Mirai Minato (“The Great Jahy Will Not Be Defeated!”) at studio SILVER LINK (Chivalry of a Failed Knight). In the process, Michiko Yokote (“Takagi-san”) wrote the script, while Tatsuya Katou composed the music.
The streaming service Crunchyroll offers all episodes in the original Japanese version with English subtitles on demand.
Masamune Kun no Revenge Season 2 Announcement Teaser
Masamune-kun’s Revenge: Storyline
Makabe Masamune has completely changed for only one reason: He wants revenge. Unlike his past, he has worked hard to look good to achieve his goal. Faster than expected, on his first day at his new school, he also meets the target of his revenge… Adagaki Aki! He wastes no time and starts his plan, but revenge is not easy.