The two books are a continuation of the Evil Spirit Series (Akuryou), but in a different setting.

The Black Board is an advertisement board over a kilometre long on which thousands of job offers are posted. Jobs ranging from the most normal to the most sordid... But how do you react when, on one of these ads, you discover that someone is offering money to murder you? And that the biggest bounty hunter in town is already after you?

More adventures of Ryou and Hakuou.

Do we hereby pledge to love and protect each other in health, in sickness, in curse, and in ugliness?

The young lady Lina originally comes from the wealthy count Randall’s family line. However, because of the bad weather that resulted in bad crops and because of her good-natured father, the family ended up being severely swindled. She quickly fell and became a poverty-stricken young lady. But then one day, Lina is forced to participate in the evening party to decide the fiancée of the third prince Gilberto... Since she stuck out like a sore thumb she decided to leave after she got a glance of the prince, but... What is that dazzling light behind the cheers of joy the young ladies are making...?! (Source: Kadokawa, translated)

Tohru Yanagi, aka BYDE, is an obsessive gamer with a penchant for fantasy tropes. It should come as no surprise, then, that after playing his favorite VR game "Last Fantasy" for 100 hours straight, his heart gave out and he died. In the endless void after death, he met Celuenon, the god of gaming. Intrigued by his skills, Celuenon invites him to the world of Krenaklem, a land of swords and sorcery and all of those typical isekai tropes. Tohru accepts, and naturally is sent to another world. So what's the catch this time, you might ask? In lieu of giving him any skills from Last Fantasy, Tohru instead was gifted a deck from "Monster and Magic Masters" - a physical card game he used to play in the past. And just like the trading card game, as long as he has the required mana he can summon any card from his deck, ranging from monsters to his faithful wolfgirl assistant Waff.

Cesare Borgia, the most beautiful hero in the history of the Renaissance. The story depicts Cesare's first and last love, which oscillated like a flame for a moment between history.

「You are my fiancee. But, there’s no need to curry favor with me」 Lillimaria, a young daughter of an impoverished noble family, had been chosen as the second marriage partner for an old earl from a remote region. For the sake of her family, she had prepared herself for the worst and headed to the family she was marrying into, but what awaited her there was a youthful good-looking earl accompanied by a strange-looking lion. Then, the perpetual youth who was possessed by a demon, came to offer her… a marriage arrangement only in paper!?