The second season of Ansatsu Kyoushitsu. The students return as school is back in session for the second semester. Following their exploits on the island during summer vacation, Class 3-E continues to sharpen their blades with their sights set on their teacher, the slippery Koro-sensei. They have more to worry about than just their teacher, however, as enemy assassins, both old and new, are out for the increased bounty on the octopus' head. Moreover, their rivals in Class A, as well as Kunugigaoka Junior High's fearsome principal, stand to block Class E from achieving academic excellence. With all of these obstacles opposing them, the group must continue to work together in order to overcome their foes and accomplish their goal of successfully assassinating their teacher.

A Hunter is one who travels the world doing all sorts of dangerous tasks. From capturing criminals to searching deep within uncharted lands for any lost treasures. Gon is a young boy whose father disappeared long ago, being a Hunter. He believes if he could also follow his father's path, he could one day reunite with him. After becoming 12, Gon leaves his home and takes on the task of entering the Hunter exam, notorious for its low success rate and high probability of death to become an official Hunter. He befriends the revenge-driven Kurapika, the doctor-to-be Leorio and the rebellious ex-assassin Killua in the exam, with their friendship prevailing throughout the many trials and threats they come upon taking on the dangerous career of a Hunter. Based on the manga by Togashi Yoshihiro.

Mari Tamaki is in her second year of high school and wants to start something. It's then that she meets Shirase, a girl with few friends who's considered weirdo by the rest of the class and nicknamed "Antarctic" since it's all she ever talks about. Unlike her peers, Mari is moved by Shirase's dedication and decides that even though it's unlikely that high school girls will ever go to Antarctica, she's going to try to go with Shirase. (Source: Anime News Network)

Even after dying countless times, Subaru finally ended the threat of the White Whale and defeated the Witch Cult's Sin Archbishop representing sloth, Petelgeuse Romaneeconti. But only shortly after overcoming a tragic ending and reuniting with his beloved Emilia, Subaru learns that Rem has been erased from this world, having fallen victim to the White Whale's Fog of Elimination in the midst of Subaru's death loop. With the White Whale now gone, Subaru and Emilia are forced to confront a reality they never dreamed would happen. (Source: Crunchyroll)

After five years of harboring unspoken feelings, high-schooler Taiju Ooki is finally ready to confess his love to Yuzuriha Ogawa. Just when Taiju begins his confession however, a blinding green light strikes the Earth and petrifies mankind around the world— turning every single human into stone. Several millennia later, Taiju awakens to find the modern world completely nonexistent, as nature has flourished in the years humanity stood still. Among a stone world of statues, Taiju encounters one other living human: his science-loving friend Senkuu, who has been active for a few months. Taiju learns that Senkuu has developed a grand scheme—to launch the complete revival of civilization with science. Taiju's brawn and Senkuu's brains combine to forge a formidable partnership, and they soon uncover a method to revive those petrified. However, Senkuu's master plan is threatened when his ideologies are challenged by those who awaken. All the while, the reason for mankind's petrification remains unknown. (Source: MAL Rewrite)