The Demon Lord Tasogare's castle is a dark and frightening place, filled to the brim with various monsters. Any soul unfortunate enough to be imprisoned here is sure to be terrified by the horrors within. However, the human princess Aurora Suya Rhys "Syalis" Kaymin is a different case. Rather indifferent to her situation, Syalis worries about one thing and one thing only—sleep. Ever since the demon lord kidnapped her from her kingdom, she has not had a single good night's rest. To alleviate her dozen dozing issues, the princess makes do with what she can find in the castle. Whether it be the fur of fluffy demonic teddy bears or the silky, blanket-like bodies of ghost shrouds, everything is but a means to ensure a peaceful slumber. With so many potential materials to craft items that can help her sleep at her disposal, nothing will stop the sleepy princess—not even death. [Written by MAL Rewrite]

Hana Ichinose, a 17-year-old high school student who is not only introverted, but also insecure and timid, has just moved and will be attending a new school. To make her situation more difficult, Hana is a "slow start," which means that she missed a year and worries about attending a class where everyone is younger than her. During her introduction, the teacher reveals it is Hana's birthday, which gives her the jumping-off point to meet three of her classmates: Tamate Momochi, a charismatic and extroverted girl; Kanmuri Sengoku, who is shy and small; and the popular and pretty Eiko Tokura. Not wanting to lose the chance to make new friends, Hana's interactions with these three mark the beginning of some beautiful relationships that will change her life. [Written by MAL Rewrite]

The day is as normal as it can be in high school as the students peacefully go about their everyday activities until an unprecedented catastrophe strikes the school, killing every person in its wake. Guided by what seems to be a miracle, a handful of students are fortunate enough to be reincarnated into another world as nobles, princes, and other kinds of people with prestigious backgrounds. One girl, however, is not so lucky. Being reborn as a spider of the weakest kind, she immediately experiences the hardships of her dire situation. Even so, she must press on to survive the numerous threats that endanger her life. Discovering that her new world has a system like that of an RPG, she tries her best to hunt prey and defeat monsters to level up and evolve. As she gradually grows stronger, she hopes one day her efforts will be rewarded, and that she will be granted a better life. [Written by MAL Rewrite]

In the continent of spooner, sorcerers, who are the continent's aristocrats, have begun to abuse their powers. Under the guidance of Big Momma (their boss) Carrot (who turns into a giant monster every time he's placed under a magic spell), Gateau (a bodybuilder), Marron (a mage), Chocolate and Tira (who can transform into dominatrix's at will) must stop the evil sorcerers from picking on the weak; however, none of them (except maybe Marron) have a clue to what's going on. (Source: ANN)