Based on the historical figure of Sakanoue no Tamuramaro, a court noble, general, and shogun of the early Heian period of Japan.

"I am a former decathlete, and in exchange for helping me get back into the sport, I am asked by the school's director to help his three daughters compete in the national championships." I, Itsuki Juuouji, a former decathlete, receive a request from the school's chairman in exchange for support in returning to competition, but all three of his daughters are troubled children filled with worldly desires!? Sadistic, masochistic, and exhibitionist... These three sisters direct their naughty desires towards me that they can't release in their school life. Is my life in danger if we live together!? I'll let you release your naughty desires through training that will make the most of your unusual sexual tendencies! Later on, I regret that I underestimated the three sisters' sexual proclivities! (Source: Overlap Bunko, translated)

Nozomitarou reads about Dougen Majima's Sekai Kakumei Kyoudan X cult in a magazine and is attracted by its sense of purpose and the glamorous lifestyle its members lead in the big city of Tokyo. He ends up moving to Tokyo and joining the cult, becoming a salesman for supposed miracle cures, and helping Majima publicise his predictions of a massive earthquake and ensuing political collapse. The story is narrated by an older Nozomitarou looking back after leaving the cult, and is inspired by the author's experience as a former cult member.

https://bigcomics.jp/series/35192e9b6a0d2

Princess Hisui is married to the third prince of a neighboring country, Sakuyao, who is only 10 years old. However, there is a big secret behind this marriage. After learning the truth behind the events, Hisui makes a plan to escape, but Sakuyao finds out everything and stops her in a strange temple. There, someone locks the two of them inside, sets them on fire, and tries to kill them, but Hisui lets Sakuyao escape first and they manage to escape overnight...or so they think. In fact, 10 years have passed outside. Sakuyao, whose age has been transformed, has risen to the position of emperor and announces that he will make Hisui his wife...!? (Source: Akita Shoten)