Interesting Historical Romance (manga)

After two hundred years, A young alchemist known as Marielle wakes from her slumber.

The Kingdom of Endarisa had been brought to ruin by the stampeding 'Forest of Demons.' Although Marielle managed to escape by using the power of 'Living Death,' she made a clumsy mistake,and ended up sleeping for two hundred years.

The age in which she awoke was a completely new world. Here alchemists were all but extinct and potions could only be afforded by the rich and powerful.

Lise, a knight and daughter of a baron of the Kingdom of Olwen, lost her life protecting the young imperial prince Egbert. After death, she wakes up in the past with all her memories! But somehow she’s become engaged to the imperial prince? The story of a (Former) Lady Knight… trying to dissolve her engagement?! A romantic comedy about a reborn Court Lady with a secret!

My fiancé betrayed me and married a nobleman’s daughter. Furthermore, I, Cecil died at the age of 18 after suffering from a cold.

“I will absolutely live my life as freely as I want!”

Ruri got summoned to another world together with her selfish childhood friend Asahi.
At the summoning place it was said that Asahi is the long awaited shrine princess!?
And as her former classmates that also got summoned with them thought that Ruri was a burden so they throwed her alone into the forest.....

I'm aiming to be like Haare's number one receptionist onee-san!
In a world filled with magic, from a young age, Nanari has always wanted to be a receptionist at Haare, just like that onee-san. Her parents told her she couldn't become one unless she enrolled in the kingdom's magic academy and became a top-class magic user. However, when she gets there she's surrounded by royalty and nobility. Nanari is determined to be the best amongst all the commoners!

A Japanese person reincarnated into an Otome game chok full of death flags for the villainess, Rosalind.
"I'm going to live an enjoyable life in this world!" Making full use of the game knowledge to avoid death flags, for some reason events keep happening one after another?!
Contracting with spirits, helping her father (the prime minister) with his work using her modern day knowledge, taking a walk with the holy beast... and on top of all that, even starting up the heroine's event...?

In a world where only men can use magic, Eco can use magic despite being a woman. Even though she was living while trying to hide her power, her magic might be exposed. Then, her cousin suggests "work at the Magic Bureau in my stead." Eco decides to dress as a man and work as a mage. However, when she arrives, there are strange colleagues and incidents. Her life is full of trouble!?

Fiolia is the daughter of a duke, thoughtful of her people and active in her fiefdom.
One day, she is poisoned by the heroine of an otome game and falls into a coma. When she wakes up, she regains the memories of a previous life... but finds out twenty years have passed?!
Fiolia learns of the scheming that the game heroine, Anne Rose, has been up to and that has been damaging the country. In order to return the favor to Anne Rose and save the people, she must act!

Crown prince Cecil was so brilliant that everything in life was easy to the point of boring him, then one day, his fiancée Bertia suddenly said "Prince Cecil, I am a villainess!" Claiming that this world is the same as that of an "otome game" from her past life and that she is playing the role of the "villainess" in it, she aims to play her part well and have their engagement annulled. With that goal in mind, she sets about causing turmoil in Cecil's daily life.