The Disastrous Life Of Saiki K. 12

At a video rental store, Saiki has the challenge of picking a film that won't get spoiled by the clerk's thoughts. Saiko offers to pay Nendo to be his underling, but Nendo refuses, preferring to just be friends. Kaido hosts a Halloween party, but the guys have no clue how to dress or what to do there. Saiki is interrupted by his friends during the break in-between class periods. Toritsuka asks Saiki to help him impress a girl named Aiko by joining Hairo's tennis team training. Chiyo has become morbidly obese, so Saiki uses telepathy to project Kaido's image to motivate her to exercise to lose the weight. Saiki's parents celebrate their 19th wedding anniversary when Kusuke calls and informs them that Saiki's limiter might have a problem. When Saiki awakens, he finds himself 20 years in the past and must stop Nendo's father from ruining his parents' first encounter. Although he gets his parents to meet, but when he returns to the present, things have adically changed due to the butterfly [...]effect to a post-apocalyptic world. Saiki finds that Kusuke had been using a time machine and started World War III. In a cross-over chapter, Saiki and his father visit the diner from Food Wars!: Shokugeki no Soma. Saiki, Kaido and Nendo are shopping at a clothing store when they see Kokomi and attempt some questionably fashionable clothes. Kuboyasu, who has been dealing with a lot of challenge letters, receives a love letter for once and doesn't know how to respond.