- Original Release Date: April 26, 2011
- Opening Song: "Highschool of the Dead"
- Closing Song: "Best friends"
- Manga Chapters: None
The episode begins with a voiceover by Takashi giving an extremely fast recap of the previous episodes, interspliced with various ecchi scenes. The scene then shifts to the present day where Takashi and co. have arrived on a small, remote island in the middle of the sea which is supposedly cut off from the outside world. Saya sighs and asks how they ended up here (in a rhetorical manner). Kohta then begins explaining how they were on the run from "them" and inadvertedly ended up on the island as it "was a pain" to continue onwards. However, an exasperated Saya tells him to shut up. The rest of the gang then catch up to meet with the two. Rei comments that it might be a nice place to stay for awhile, but Saya contradicts her, saying that there are no facilities or shelter on the island. Alice then catches sight of a beach shack and points it out to Saya, much to her annoyance (and the others' delight). After checking out the shack (which apparently used to be a multi-purpose store) and selecting bathing suits, the gang come out. Everyone ends up a little creeped out at Kohta, who has chosen a female school swimsuit. Takashi meanwhile has been forced to wear an extremely tight speedo that highlights his crotch.
The girls then coax Takashi and Kohta to find food while they go and frolic on the beach, providing quite a number of "fan service" shots.
Takashi goes foraging to the interior of the island while Kohta excitedly goes fishing after fixing a bayonet on a stick.
Takashi and Zeke return with their expedition a failure. The depressed group is quickly cheered up by the arrival of a jubilant Kohta who has caught some fish. Takashi becomes a bit depressed about his uselessness.
While cooking the fish outside, Shizuka-sensei begins to feel dizzy, which she attributes to the lack of food. However, the others begin feeling drowsy and dizzy as well. Suddenly Shizuka-sensei realizes that the dry leaves that they used for the fire are actually Hydrangea, a plant with intoxicating properties which induces hallucinations.
Soon the entire gang (except for Takashi and apparently Saeko) begin hallucinating. Rei, Shizuka-sensei and Saya attempt to seduce Takashi and have sex with him, while Kohta goes around yelling about a revolution. Takashi is saved by an apparently unaffected Saeko, with whom he escapes. The two go to a remote region of the island and Saeko (revealed to be affected by the smoke) seduces Takashi, kissing him. Takashi succumbs to the smoke's effects begins removing her bikini top and fondles her breasts.
Meanwhile the others are kissing and playing with each other's breasts (Shizuka-sensei with Saya, who she imagines to be her friend Rika, while Saya who imagines Shizuka to be her mother).
The episode then cuts to morning, when a naked Saya wakes up with her face in Shizuka's bosom. She hears a squeaky sounds and looks to see Kohta humping a boomstick while yelling "MORE" and "REVOLUTION" and Saya screams. She looks the other way and sees a naked Rei and Saeko are kissing passionately while both are mumbling Takashi's name. Saya looks back and forward until she screams "NNOOOOO!!!". The five then sit awkwardly and talk about how it was all an accident and that it didn't mean anything.
Alice then runs over shouting something about Takashi.
The group follows her and it appears that Takashi (still wearing his speedo) is having a wet dream while mumbling Rei, Saya, Saeko and Shizuka's names as he moans about them doing something sexual to him and telling them to stop. The girls blush and look horrified. However, the camera pans out revealing several zombie girls in bikinis whom he is fending off with his legs and arms as they try to bite him.
Horrified, Saeko and the gang pull out their weapons. Suddenly, one of the Them accidentally falls headfirst into Takashi's crotch.
The episode then fades to black with him screaming "NNNNOOOO!!!!!!!".
Following the credits Alice explains that contrary to the gang's belief, there was a tunnel connecting the outside world and the island together. She then states that their mission is not over and that there is more to come. The episode ends with the text "TO BE CONTINUED".
- Due to the episodes extreme sexuality level, Alice's character seemingly disappears during the night the group endures the hallucinations. However, she simply ran away with Zeke when told to by Takashi. This was done out of decency by the writers.
- The weapon Takashi found at the swimsuit hut can be seen to have the letters "HOTD" on the side, representing Highschool Of The Dead.