Btooom!

Synopsis

Masahito's BIM explodes, seemingly killing Ryouta, and causing Himiko to lose the will to fight, but Shiki, saves her and wounds Masahito. However Masahito had planted traps throughout the building and lures them near the traps. A flashback shows that Himiko had deduced that Masahito has placed a bomb in the case. Masahito manages to hit Shiki with a bomb, while Himiko laments that she didn't get a chance to tell Ryouta that she was the Himiko he knew. Masahito then tries to use Ryouta's cracker-BIMS to no avail just when Ryouta shows up behind Himiko. Using the cracker-BIM that didn't detonate, Ryouta chases Masahito, into another trap. Another flashback shows how Ryouta survived. As Masahito tries to activate the trap he realizes to late that Ryouta moved it next him, and it explodes and injures Masahito. In the aftermath, although both Himiko and Ryouta are after his chip, neither wants to kill him, until Shiki appears again. She tells them she will kill him, but at the last moment, she alters the path of the blade, saying she will never forgive him. Ryouta and Himiko have a conversation while Himiko has an outdoor shower, about why Shiki spared Masahito. In the epilogue, the two of them check the corpses of Ryouta's first victim, the father of Kira, and Mistuo, for their chips, but all find three of them had been removed. Ryouta realizes that the only one who could have known about them was Kiyoshi, and they go back to where he is resting. However when Ryouta begins climbing the ladder, he hears a homing-BIM approaching, and realizes that Kiyoshi had turned against them.

(Source: Wikipedia)