Strand of Agony

Thread of Agony (苦悶の糸 Kumon no ito, lit. An agony thread) is an execution in Danganronpa V3: Killing Harmony, with Kirumi Tojo being executed and Monosuke being destroyed in the process.

Sequence
Kirumi is being chased through a hallway by a group of protesters. As she tries to run away, she gets blocked off by another group. She didn't know what to do until she sees a vine with thorns drop down from the ceiling. The vine goes through a couple of spiderwebs. Kirumi grabs on and climbs up, because of it being the only way out, piercing her hands in the process.

Kirumi then stops as she encounters a large group of circular saws activating throughout the walls. Kirumi stared for a moment, but she proceeds to climb through. As she makes her way to the top, she gets slashed and lacerated several times, causing her to scream in pain. Soon after she escapes from the saws, she gets worn out and a lot of her clothes are cut off. She then looks up to see a blue sky and sunlight pouring through a hole on the ceiling. Thinking that it is a way out, she continues climbing and reaches for the gap. Instead, she touches the ceiling and the hole turns out to be a children's drawing of a sky and a sun. The vine then breaks, causing Kirumi to fall. On the ground, Monodam shoves Monosuke below where Kirumi is falling. As Monosuke frantically looks for his glasses, Kirumi falls onto Monosuke, killing her and destroying Monosuke.

Monodam then looks over Kirumi's corpse and Monosuke's now destroyed body as various red roses flutter and fall to the ground. The children's drawing, which was previously attached to the ceiling, descends and lands onto Kirumi's dead body, soaking it with her blood.

Trivia

 * The written signature on the childish sky drawing Kirumi sees after climbing the vine translates into "Monokuma, 3rd Grade Class 3". This is most likely referencing Danganronpa V3 being the third main series entry in the franchise.
 * This execution is based on the famous Japanese short story,  by . The story concerns Kandata, a cold-hearted criminal suffering in Hell; however, he performed a single act of compassion in his life when he chose not to crush a spider underfoot. Moved by this action, the Buddha takes the silvery thread of a spider in Paradise and lowers it down into Hell. Kandata, with all his might, tried to escape from the abyss using the thread, but quickly got tired because of the thread's great length. When he looked down, he saw many other sinners in Hell trying to escape using the spider's thread. Fearing that the rope will break from the weight, Kandata greedily shouts that the spider's thread is his and his alone. This action ultimately made the rope break, leaving Kandata and the other sinners to fall into the Pool of Blood once again.
 * The title of this execution (Kumon no Ito lit. Thread of Agony) is a pun to the short story's title (Kumo no Ito lit. The Spider's Thread).
 * The chapter's title, A Limitless Hell Close to Heaven, is referencing to this execution's sequence where Kirumi tried to escape from the academy using the thorny rope.
 * Kirumi shares similarities with Kandata; she tried to escape from the "Hell" alone and at the expense of everyone else by committing murder for the sake of escaping, similar to Kandata who selfishly tries to escape from the Abyss alone.
 * Because Kirumi previously tried to escape from the class trial room before the execution, the intro shows Kirumi running away from a pursuing Monokuma rather than her being dragged away. This also ties into the beginning of the execution, where Kirumi flees down a hallway before being cornered by protestors.
 * The vine tied to "nothing" that Kirumi is forced to climb might be based on a magic trick called the Indian Rope Trick.
 * This is the only execution where Monokuma doesn't appear at all physically during the sequence.

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Thread Of Agony