Transfer student, Aoba Shunsuke, arrived at Sunshine School only to find the premises empty. He was secretly gleeful to be the first to reach the school, oblivious to the fact that it was Foundation Day and a rest day for the institution. At that moment, a big-sized "L"(Eru) beauty by the name of Natsumi appeared before him and the two of them hit off together even though Shunsuke was so much smaller than her. Shunsuke's mother runs a women's apparel busines but the shop is in need of manpower. Shunsuke offers to help out at the shop but fumbles a lot because he does not know how to interact with the ladies. Eru decides to step in and help out around the shop and this pleases Shunsuke's mother. This is a romance story that shares the joys and woes of the "SL" combi between Shunsuke and Eru.

Wataru Sajou is infamous in his school for persistently seeking the attention of his crush, Aika Natsukawa. His usual day revolves around shadowing her and confessing his undying love at every turn. However, a moment of epiphany leads Wataru to relinquish his childish behavior and face the reality that she will never return his one-sided feelings. He distances himself from Aika and spends his newfound spare time with his friends and in the company of other lovely girls. As Wataru moves on, Aika starts approaching him in unusually suggestive ways—making him question whether giving up on his love was the right decision after all.

In 19th century France, a struggling single mother, Fantine, leaves her three-year-old daughter Cosette in the care of her new acquaintances, the Thernadiers. Unfortunately, Cosette's caretakers prove to be anything but loving, and the poor girl is subjected to repeated abuse and forced servitude. Still, she endures the torment in the hopes of seeing her mother once again. One night, while doing errands for her host family, Cosette is assisted by an honorable stranger named Jean Valjean. After a brief conversation with the young girl, Jean acknowledges her as the type of person he has been seeking and rescues her from the clutches of the Thernadiers. They make their way to a nearby town where Cosette enjoys a new life thanks to her savior. Under Jean's guidance, Cosette promises to help others with her newfound freedom. She pledges to heal the nation, ensuring that no one else suffers her fate. Though the road ahead is paved with tragedies left by the French Revolution, this idealistic girl will not rest until France is freed from poverty and suffering.

The story takes place in the land of Amber Ground, a place of perpetual night only partially illuminated by an artificial sun. Lag Seeing works as a "Letter Bee" (delivery boy) at the "Bee Hive" (a delivery service), with his Dingo, Niche, and her "pet," Steak, traveling with him. He is entrusted with the "hearts" of the everyone in Amber Ground to deliver their packages.