The series is based on the works of H.P. Lovecraft, with a focus on the recurring character Randolph Carter in H.P. Lovecraft's works that Kadokawa states is modeled after Lovecraft himself. (Source: Anime News Network) *Note: this includes one extra chapter.*

One cannot say “like” so simply… Muzu-kun frustration Love, start! (Source: Chibi Manga) *Note: Includes 2 bonus chapters.*

Riri's hobby is observing other people, as she has the power to see other people's degree of feeling for each other. Every day she enjoys watching from afar... but that was supposed to be it! When Riri's friend Yosai confessed her feelings, things got complicated (?), as Riri found herself caught up in a messy relationship...! (Source: MangaTime Kirara Forward, translated)

The spin-off manga follows the "genius" Amiba, who can learn any fighting style faster than anyone else. After he is defeated by the original series' protagonist Kenshiro and dies, he wakes up in another world and begins a new adventure.

In the stories "The Cats of Ulthar," "Celephaïs," and "The Other Gods," H.P. Lovecraft takes you through eerie dreamlands. In "The Cats of Ulthar," cats mysteriously disappear, while in "Celephaïs," a British nobleman rises to become a king and a god, only to experience his downfall. In "The Other Gods," a high priest and his disciple encounter not only the gods of earth, but also those from the depths of hell... (Source: Carlsen, translated)

The second episode of Himawari taking place in 2048, before the first episode, and focusing on Aqua.

\- Sensei's Virtuous Kiss? If you kiss an arrogant prince, will your wish come true?!

The king's niece, Sheryl, possesses the "Ark of Knowledge"—the ability to record every word she reads into a vast, otherworldly library. One day, hidden within its shelves, she discovers a “biography” she has no memory of ever reading: her own. And within its pages lies a chilling revelation—her future as the bride of Luke, a cruel and ruthless marquis from an enemy nation, and her eventual murder at his hands! Her only path to survival? Make her future husband fall head over heels for her! Thus begins Sheryl's fruitless effort to ensnare Luke's heart. Yet her earnest, unwavering innocence begins to unconsciously stir something within Luke… [Original Web Novel](https://ncode.syosetu.com/n9531ka/) [Original Web Serialization](https://comic-walker.com/detail/KC_008497_S)

Taerin, a high school student with spiritual abilities, one day learns the story of a ghost. Realizing that people are more dangerous than ghosts, Tae-rin decides to relieve her childhood friend Chang-woo and the ghosts' grievance... (Source: Naver, translated)

From [Chibi Manga](https://www.mangaupdates.com/groups.html?id=3006): I can't fall in love with himーーbecause he's a primary schooler! A super high tension love comedy!