After her mother's passing, Mio is left completely and utterly alone. One day, a man shows up out of the blue, taking her in after claiming to be her father. Mio is soon used as a tool for a political marriage. She is told to marry into the Ichijo family, and to give birth to a son within a year. The Ichijos are prestigious; they have ties to the imperial family, work under the emperor, and have served as exorcists. However, the head of the Ichijos, Kazuomi, shows no interest in Mio, and even refuses to speak to her. A fate worse than death awaits Mio if she can't give birth to a son in time... Mio spends day to day in despair, but one day, she learns of a major secret about the Ichijo family. Kazuomi's tune begins to change once it becomes clear that Mio also possess a special power that connects her to this secret! *Source: Manga Plaza*

When Claudia's father dies, her stepsister ensures she loses everything—her family, her home, her status—and sells her to live out the rest of her days in a squalid brothel. At her lowest point, one person reaches out to her: a ruthless marquess known across the nation as the Crimson Devil. Vowing revenge, Claudia joins hands with the marquess to rebuild her life as his wife, Luce, and seeks out revenge against her stepsister. What comes to follow is a tale of revenge that will shake the very foundations of the nation's court... (Source: POCKETCOMICS)

A protagonist whose reality turned into game; the power of save-and-load bestowed to him; heroines with different and unusual personality traits. This is a story that turns around the whole concept of a romance game.

I’ve become a rogue lord in another world! This is the story of the protagonist, who has become a rogue lord. He dies during the prologue after two days, but successfully uses the game’s history and system to escape his impending doom and become the strongest! (Source: Kadokawa, translated)

I was just living in modern Japan, when I realized I reincarnated in a early modern european styled world… no, it’s just like Europe, right dad? Anyway, I was reincarnated in a european fantasy. This is the great(?) tale of I, Joseph Wallace. Probably. My second birthplace, the Silesia Kingdom, was in a precarious situation. The neighboring kingdoms military were pressuring the Silesia Kingdom until it collapses. I felt I should use my previous world’s knowledge to the fullest so I enrolled in a military academy… to become a cheat hero. Yep. I did not swing a sword in my previous life, I did not ride a horse in my previous life. Magic? What is that? I recalled “unnecessary information”… it’d be great if my story starts. Source: NU

The daughter of the Earl, Rosa, was known for her beauty and compassion. But in reality, she was a rotten lady who pursued her ‘moe’ by making delusions of ‘rose love’, the romance between men. Her dream was to become a nun and write down a ‘bible’, spreading the rose love throughout the continent. As the preparation of entering the priesthood, she donated to the monastery (as a bribe), strived to improve literacy (to prepare for her missionary work), and made humus for her territory (as the symbol of rottenness). One day, she met her half-brother, Bernard, a fourteen years old boy. Concluding that Bernard was the ideal ‘uke’, a talented person that only appeared once every a thousand years, Rose devoted herself to ‘Bell-tan’s Harem Plan’. However, her rotten behavior was mistaken for noble deeds. The princes, princesses, and even the foreign princes started to get involved, and she began to spread her influence all over the country…? This was the story of Rosa von Langheim, nicknamed the “Rose Angel” as the symbol of her nobility and charity, who was the most rotten lady of all.

An anthology comic of Fate/Grand Order by various mangaka.

By the time I realized it, I had reincarnated into another world. I kept sleeping, and at some point I became a Demon Lord. Even though I never wished for it. But for me to not have to work, this world is the best. It must be true that good things happen to good people. The flavor of Sloth is as sweet as honey. Glory, diligence, virtue, or honor. I have no interest in anything like that. What's there to hide? The Lazy king is none other than me! (Source: Yoraikun Translation)

A manga anthology based on the DMM Games/Nitroplus browser game Touken Ranbu -ONLINE- by the editorial department of shounen magazine GFantasy.

Yuuji Manase, a university student, is rather popular with girls even though he is the taciturn and withdrawn type. In fact, he hides a secret wound that will be revealed during the visit of his hairdresser sister: he does not feel at ease in this body of a man... *Note: Includes epilogue and an extra.*