Sentimental Journey is a collection of twelve short stories about twelve different girls. Though unrelated, there is one common theme that binds the episodes together: each girl's bittersweet experience of first love.

Makoto Kubota wandered through life, not taking things too seriously or looking too deep within himself. His job as the head of the Izumo Group's youth gang kept him pleasantly occupied with yakuza wars, mahjong and assassinations... Until the day he stumbled upon a strange drug called Wild Adapter that produces bizarre side-effects—including death. Forever changed, Kubota becomes entangled with a drifter named Minoru Tokito, and the two form an unlikely companionship that draws them deeper into the mystery of Wild Adapter...

Life in Brailsford Junction, Wisconsin, is simple and quiet for Sterling North, who spends most of his free time caring for animals. With his mother in the hospital and his brother fighting on the Western Front, the boy lives only with his father and his dog Hauser. One weekend, cutting away from his usual chores, Sterling, his friend Oscar, and Hauser head off on a fishing trip. On their way to the river, his dog catches a scent at the base of a tree. Unearthing a raccoon's nest, the two boys find an orphaned kit. A passing hunter has killed the kit's mother to make a fur hat, leaving Sterling to adopt and care for the orphaned raccoon. Torn by his fracturing family, a brother in the trenches, along with the ailing health of his mother, Sterling's bonds with life and the world around him are kept together and strengthened by life with his new friend, the "ring-tailed wonder" and scoundrel, whom he names Rascal.

Bokutou Precinct rarely deals with criminals more nefarious than speeding sportscar drivers. So when Officers Nikaido Yoriko and Aoi Futaba find a cache of illegal firearms in a stolen car, and a rash of traffic control malfunctions snarls traffic along Tokyo's streets, it is up to Tokyo's finest to figure out what's gone wrong. And of course, it'll take the talents of Kobayakawa Miyuki and Tsujimoto Natsumi to crack the case. But will Miyuki's trusty Mini-Pat and Natsumi's fierce determination be enough to stop a devious mastermind from exploiting the weaknesses of the system and crippling Tokyo—and the world—for good?