Ryota returns with the food supply case to Kiyoshi. In a flashback, Hisanobu Sakamoto, Ryota stepfather, caught Yukie trying to commit suicide after regretting causing him to "disappear". While Ryota and Kiyoshi are eating near the river, the corpse of Mitsuo without pants washes downstream, leaving Ryota and Kiyoshi to speculate. Ryota, 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 Ryota 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 Ryota's arms and, upon the fear of being violated again, activates a Timer BIM hidden in her pocket, but Ryota deactivates it. Back at the campsite, she explains to Ryota 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 Ryota realizes that his own mother had chosen him for defying her. Suddenly, the group is attacked by a pack of Komodo dragons.