If you're looking for manga similar to Fiancée of the Wizard (Light Novel), you might like these titles.
Michio Tsuchida, a 35-year-old single man. One winter, while returning from the office, he got stabbed by a kitchen knife in the process of saving a girl. The pain of stabbing spread throughout his body, making him lose his senses. The next time he opened his eyes, he found himself as the fourth son of a viscount in another world.The story is about a reincarnated boy who enjoys his new life while using his past knowledge to reform his territory.
Saki Amemiya has spent her life filled with misfortune, from bullying to power harassment. It is right when she thinks she can finally get to go home after having worked overtime until the last train, that lightning strikes and ends her life. She wakes up and realizes a young boy claiming to be a god appears in front of her, and he confesses to her that "All the misfortunes you've had are my fault!." Saki is recommended to be reincarnated into another world as an apology, she accepts the proposal to attain happiness at last. Many divine protections are bestowed upon her...? With the apology cheat, she becomes a beautiful and genius girl?! This time, for sure, she will attain happiness! The heartwarming isekai fantasy begins♪
A nimble old man, Sagami Shirabe, has reincarnated into a body of a young boy with overpowered ability. However, he has reincarnated into a poor noble family, with a violent mother. On top of that, he gets exiled from the territory at 13... so now he is stuck in a weird situation. "If that's the case, how about I just explore this world?" or so he thought. With his abilities and past knowledge, he starts his adventure!
Myria Kanami's high school life was disastrous. Having an awful father, no friends, and spending her days working part-time summed up her daily routine... But one day, she gets into an accident that takes her life! However, she opens her eyes again, this time, in another world! She has been reincarnated into the body of 8 year-old Myria, the seventh daughter of a poor noble family residing in the countryside. As the thought of finally being released from the arduous high school life crossed her mind, she then dug into her new body's memories --- but, the situation was just as bad as in her old life!
Michio Tsuchida, a 35-year-old single man. One winter, while returning from the office, he got stabbed by a kitchen knife in the process of saving a girl. The pain of stabbing spread throughout his body, making him lose his senses. The next time he opened his eyes, he found himself as the fourth son of a viscount in another world.The story is about a reincarnated boy who enjoys his new life while using his past knowledge to reform his territory.
One evening in early spring, eight-year-old Erika Aurelia realizes she’s the detestable little villainess from an otome game called Liber Monstrorum: The Winter Maiden and the Phantasmic Beasts. As if that wasn’t bad enough already, Erika’s role in the game is to pester the main character... and then die in order to kick off a mysterious series of events! These incidents are different in each love interest’s route, and seven routes means seven deaths to avoid. Not one to throw in the towel, Erika knows she must take action to destroy her death flags—and since her life is on the line, there’s no time to lose!