Netheril’s Glory - Chapter 97: End of the Dark Green Spider.

The Empress who dies in torture, An Rushuang is her name. After she wakes up, she finds herself has time-travelled to when she was twelve years old, but she would turn into Major General’s white horse at night. He is a general who orders about the winds and clouds on the battlefield, and she is a little girl lives in her boudoir seclusively.
She endeavors to change her fate, and he spared no effort to win every battle. They meet each other every day, well, it’s night to be accurate. Is that a dream or not? She pleads to marry the seignior to win peace for her family, only to find he is the one she is going to marry.
“Growing old with you under the same roof is my long-cherished wish”, thought them both.

- Description from Novelupdates

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

Gods choose those with natural talent; demons choose those who never give up.My name is Dylan Chen, a person chosen by the demons. Of course, you can also call me “Ghost Guest.” On the road of reincarnation, just mention my name, and the guards of the netherworld will make way for you.That day, I asked the heavens three questions, and the celestial beings and Buddhas remained silent. Then I knew there was no longer a place for me in this world. Therefore, I have no choice but to kill them all!Better to live a complete life as a mortal than to be an immortal for eons! This immortality, I shall not pursue!