Attack.Ryōta returns with the food supply case to Kiyoshi. In a flashback, Hisanobu Sakamoto, Ryōta stepfather, caught Yukie trying to commit suicide after regretting causing him to "disappear". While Ryōta and Kiyoshi are eating near the river, the corpse of Mitsuo without pants washes downstream, leaving Ryōta and Kiyoshi to speculate. Ryōta, suspecting that an enemy may be lurking upstream, goes to investigate and discovers Himiko waiting atop a cliff. She draws him out into the open by throwing a Blazing Gas BIM into the forest. Although he attempts to reason with her, she attacks him with a Cracker BIM, prompting him to charge at her. She uses her stun gun to defend herself, but Ryōta causes her to stun herself and land on top of him. He is tempted to grope her while she is unconscious, but he pieces together that she was previously assaulted by Mitsuo. Himiko awakens in Ryōta's arms and, upon the fear of being violated again, activates a Timer BIM hidden in her pocket, but Ryōta deactivates it. Back at the campsite, she explains to Ryōta and Kiyoshi that everyone on the island had been picked by someone they knew to "disappear". Himiko knows that her friends chose her for being betrayed, Kiyoshi deduces that a real estate customer might have chosen him due to an argument and Ryōta realizes that his own mother had chosen him for defying her. Suddenly, the group is attacked by a pack of Komodo dragons.