The science lessons are short "omake" bonus features originally present on the first two volumes. Each short lasts around two minutes, and stars super deformed versions of Noriko, Kazumi and the Coach explaining the various scientific aspects of the series. (Source: Wikipedia)

Professional wrestler Genzou Shibata sports the body of a mountain, but beneath his hulking appearance is a man with an extreme affection for animals. Facing off his opponents in the ring as the legendary "Animal Mask," Genzou wins the hearts of crowds everywhere with his iconic tiger persona. During the bout for the title of World Champion against his greatest rival, the Macadamian Ogre, Genzou is suddenly summoned to a fantasy world by a princess. With her kingdom being threatened by a monster infestation, she pleads the wrestler for assistance—to which he answers by knocking her out with a German suplex! Escaping the castle and finding himself stranded in a mysterious land, Genzou decides to begin his career as a beast hunter to capture and befriend creatures far and wide. Joined by the wolf-girl Shigure, the dragon-girl Hanako, and the vampire Carmilla Vanstein, the professional wrestler pursues all kinds of dangerous requests for the sake of fulfilling his dream as a pet shop owner. [Written by MAL Rewrite]

Drugs have become the center of conflict in Japan, and crime involving them has been increasing at an alarming rate. Unable to control the chaos, the police department settled on creating a unit—STAND—that would include unique, specialized experts and professionals better suited to handle the pressing issue. Rei Izumi is a novice joining the narcotics investigation unit, assigned the daunting task of recruiting the potential representatives of STAND. While recommended for her moral sense of justice and devotion to police work, Rei also has a unique aspect of her own that may have earned her the job—she has an immunity to many, if not most, kinds of drugs. Eager to seek the possible members of STAND, Rei quickly learns that scouting the different individuals will be more difficult than she expected, as each candidate harbors their own feelings, ideologies, and willingness toward joining the team and regulating drugs as a whole. Her capability as a narcotics officer is also questioned by the many colorful personalities she meets, stirring conflict and unpredictability in Rei's daily life. However, persuading the various contenders for STAND isn't the only obstacle she faces, as becoming involved in the treacherous underworld of drugs, overflowing with deceit and secrecy, will be more hazardous than she ever imagined. [Written by MAL Rewrite]

Returning home to Konohagakure, the young ninja celebrate defeating a group of supposed Akatsuki members. Naruto Uzumaki and Sakura Haruno, however, feel differently. Naruto is jealous of his comrades' congratulatory families, wishing for the presence of his own parents. Sakura, on the other hand, is angry at her embarrassing parents, and wishes for no parents at all. The two clash over their opposing ideals, but are faced with a more pressing matter when the masked Madara Uchiha suddenly appears and transports them to an alternate world. In this world, Sakura's parents are considered heroes—for they gave their lives to protect Konohagakure from the Nine-Tailed Fox attack 10 years ago. Consequently, Naruto's parents, Minato Namikaze and Kushina Uzumaki, are alive and well. Unable to return home or find the masked Madara, Naruto and Sakura stay in this new world and enjoy the changes they have always longed for. All seems well for the two ninja, until an unexpected threat emerges that pushes Naruto and Sakura to not only fight for the Konohagakure of the alternate world, but also to find a way back to their own. [Written by MAL Rewrite]