[Machine Translation] The first half of the special summer vacation test - Survival on a deserted island - is successfully completed. The stage is now set for the group competition on a luxury cruise ship. In the second half of the exam, students were divided into 12 groups, each group consisting of all students from A to D classes, and each group had to find one "superior" student. The students were astonished by the test, which destroyed the idea of class rivalry, but the powerful students in each class, such as Katsuragi and Ryuen, discerned the purpose of the test and began to play a dark role. Meanwhile, Kiyotaka notices that his classmate Megumi Karuizawa, who has joined the same group, is different from the others...! I am a parasite. I am a parasite, a weak creature who cannot live alone. The fourth installment of the school apocalypse!