The Misfit of Demon King Academy (WN) - Chapter 30

Shuu is a member of the literary club that can’t write. One day, he gets a mysterious message on his phone from a girl called Eina, and from that impulsive contact, they begin to exchange messages. They talk of things like their shared interest in novels and grow close. However, when they try and meet, they discover a shocking truth. Eina lives… not in the present, but five years in the past! How will their love develop, parted by five years of nights…!?

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

Mu Yangling was reborn into a hunter’s family, and she expected to live a simple and happy life.However, a disaster almost shattered their home.His father was conscripted into the army because of a war, and the whole family had to follow and settle in a farming village.Unfortunately, they couldn’t even distinguish the seedlings of the five grains.As Mu Yangling looked at her mother and younger brother, who were on the verge of tears, she straightened, lifted her head, and said, “It’s okay. I have strength.”She also had some agricultural knowledge from a thousand years later!

“My only regret was.. living like a puppet for my sister!”Olivia Witherland had no one but her sister in this world. So when her sister Oriana married the duke of Aykroyd and became the duchess, she had no choice but to follow her there. Despite knowing that her sister had killed the previous duchess and going to harm the child left behind, she kept her eyes closed. But when the child grew up as Demon,he killed everyone including her and the innocent kids, Oriana gave birth to.Olivia regretted that her silence had harmed not only Damon but her innocent nephew and niece. Everyone was killed, but the killer lived a hollow life too.But fate gave her a second chance. Would she be able to save everyone or would destiny play a cruel game again?