暗殺教室 [Ansatsu Kyōshitsu / Assassination Classroom] #20

The twentieth and final volume of Yūsei Matsui's Assassination Classroom arrives with a cover that replaces the usual manic action with something unexpectedly tender — Koro-sensei's enormous, beaming yellow face emerges from a lush green hillside beneath a sweeping rainbow, surrounded by sunflowers, butterflies, and blooming wildflowers. The subtitle 卒業の時間 ("Time of Graduation") sets a quietly bittersweet tone that feels earned after nineteen volumes of classroom chaos. It's a genuinely moving send-off image for one of Shonen Jump's most warmly remembered series.