In the final pages of the manga, Chiyo, with dead, hollow eyes, looks at Kiyoshi and says the last line of the series:
Chiyo's story begins when she develops a massive, innocent crush on the protagonist, . Major Story Arcs (Spoilers) 1. The Falling in Love Arc Chiyo first notices Kiyoshi when she sees him attempting to dig a tunnel out of the prison (to escape and go on a date with the ultra-sadistic vice-president, Hana Midorikawa—a secret Kiyoshi is desperate to keep). Chiyo misinterprets his exhausted, dirty, and desperate state as a sign of a "hardworking, misunderstood boy." She projects her romantic ideals onto him, seeing him as a modern-day Jean Valjean (from Les Misérables ). She begins secretly helping him, bringing him food and water. chiyo kurihara prison school
She walks away, her innocence shattered forever. The pure angel of Prison School is broken by the very perversion she tried to ignore. Chiyo Kurihara’s story is a dark satire of the "innocent pure girl" trope in anime. She starts as the only sane, kind person in a world of sadists and perverts. Her journey is not one of growth, but of destruction . She is punished by the narrative for her naivety. The world of Prison School cannot accommodate true innocence—it either corrupts it or destroys it. Chiyo’s ending is the final punchline: the one person who believed in pure love ends up completely unable to understand love at all. In the final pages of the manga, Chiyo,
To decide the final victor, a tie-breaker "Wet T-Shirt Contest" is held. Kiyoshi, forced by Hana, pretends to have installed cameras to peep on the contest. Chiyo is heartbroken, believing he is a peeping tom. The pure angel of Prison School is broken
Chiyo is the "crown" (the rider on top) for the girls' team. Kiyoshi is the horse for the boys' team. During the brutal fight, Kiyoshi does something that horrifies Chiyo: he to win the match. This is a devastating moment for her innocent worldview. She cannot reconcile the kind boy she loved with the one who would assault her so crudely.