Following the end of Satoshi's Hoenn journey, he travels to the Sinnoh region for his next adventure en route to becoming a Pokémon Master. Immediately upon arrival, Team Rocket makes another attempt to snatch Pikachu, only for it to fail once again. However, Pikachu has fallen deep into a forest and it's up to Satoshi to find him! Along the way, he reunites with Takeshi—a Pokémon breeder with whom he has traveled through many regions—and meets his soon-to-be rival, Shinji, a power-hungry trainer who cares little for his Pokémons' feelings. Still in search for Pikachu, Satoshi notices a powerful electric attack in the distance and heads toward it to find Pikachu with Team Rocket and Hikari—a novice trainer aiming to be the top Pokémon coordinator. After foiling Team Rocket's plans, Satoshi reunites with Pikachu and Hikari joins the group. And thus, Ash and his friends begin their journey through the exciting land of Sinnoh. [Written by MAL Rewrite]

Having been accepted into the Kaede Inn, Nana struggles to find some way to contribute, though she inadvertently brings more trouble than assistance. However, Nana's worries are directed more towards fellow resident Nyu, whom she had only known as Lucy, the violent Diclonius. Fearful that Nyu will unleash the same horrific savagery—violence that scars Nana to this day—upon those close to her, Nana faces a dilemma: attempt to live peacefully alongside Lucy with all the uncertainty that that entails or dispose of the source of her worries, shattering the relationships she has formed at the inn. As Nana struggles to come to a decision, Nyu recalls a painful memory of one of her dearest friends and one of her greatest rivals. [Written by MAL Rewrite]

It's November. A student who has lost his keychain comes to Miyano and his friends, who have taken over the disciplinary committee's workload. On a whim, Hanzawa proposes the establishment of the "First Lost and Found Detective Agency," which goes out on a search party.

Just the words "I love you," and everything changes—such is the nature of the bittersweet trials of high school romance. Tenma Tsukamoto, a second year, is on a quest to confess her feelings to the boy she likes. Kenji Harima, a delinquent with a sizable reputation, is in a similar situation, as he cannot properly convey his feelings to the one he loves. Between school, friends, rivalries, and hobbies, these two will find that high school romance is no walk in the park, especially as misunderstandings further complicate their plight. School Rumble is a high-octane romantic comedy full of relatable situations, as Tenma and Kenji both try to win the hearts of those they desire. [Written by MAL Rewrite]