After main manga ends, Koro-sensei's private life outside school will be revealed

This year's 16th issue of Shueisha's Weekly Shonen Jump magazine is announcing on Saturday that Yusei Matsui's Assassination Classroom manga will spawn a spinoff set of extra manga chapters next month. The extra manga chapters will run for four straight weeks, between this year's 18th issue and the combined 21st/22nd issue.

The magazine teases that these chapters will reveal where Koro-sensei goes outside of school, and what he does there. For the first time, it will reveal what he does on vacation and in his private life, as well as what he eats.

The magazine also reports that the manga's 19th compiled book volume will ship in April, followed by the 20th in June. The 21st and final volume will ship in July. The illustrated Assassination Classroom fanbook Sotsugyō Album no Jikan (Graduation Album Time) will ship in July. The main manga is ending on Saturday with a seven-page short from Kizuku Watanabe and Jō Aoto's Koro-sensei Q! (Quest) manga.

Matsui launched the manga in July 2012, and Shueisha shipped the 18th compiled volume on March 4. The 19th compiled volume will ship on April 4. Viz Media publishes the main manga in North America.

The manga has inspired two television anime series, and two live-action films. Both the second anime season and the second live-action film will portray the original manga's ending.