Akuyaku Reijou ni Nanka Narimasen. Watashi wa『Futsuu』no Koushaku Reijou desu! - Chapter 196.1: The Miracle Diva.

aira swore she’d keep her heart locked until her final year ended. No distractions. No love. Just goals.But then he walked in—arrogant, mysterious, and dangerously charming.One wrong glance turned into late-night texts. One shared secret became a stolen kiss.And suddenly, the future she’d planned… didn’t seem so clear anymore.Can she graduate without breaking her heart? Or will love ruin everything before the last bell rings?

Durin Kesma is the third child of the Kesma family. He has three brothers and two sisters beside two brothers and a sister. It can be said that it was one of the worst that Dulin’s family was born at least for the generation.

- Description from Novelupdates

There’s the so called class transfer.

Among the high school students that were given cheat abilities, Kirishima Ran was given 『Underling Training』for some reason, a skill that can make a woman a slave.

Ran who was driven out by the kingdom using an absurd reason will make use of the given skill freely to take revenge on his classmates, release his desires (This is mainly the reason), and fight off the world’s system.

It’s a story of him using his wonderful skill making his classmates turn to an obedient cute and lewd slave.

Ding![QUEST: Defeat the Abyssal Realm Lord. Grimzark, The Dread of Tyrant.]DESCRIPTION: The Abyss Realm was once under the rule of Goddess Zyraena, but it fell into darkness when the Fallen God, Grimzark defeated it's guardian and took control.OBJECTIVE: Reclaim Goddess Zyraena's realm.Reward: Hidden Class, Gold Coins, Experience, Legendary Weapon, Return to Earth ,REUNITE WITH YOUR MOTHER Etc.Time Limit: None.Penalty for Failure: Death.You will be transported to the Abyss Realm in 5..4...3...Han Seojun is frail and barely more than skin and bones from a life of poverty, was raised by his hardworking mother with no knowledge of his father. At 18, he inherits the Ancient Infinite System, a power passed down for generations from Goddess Zyraena, The Former Echidna (Goddess of Monsters).Over five months, the system transforms his weak body and improves their lives. Just as Seojun is about to take his dream veterinary exam, he's suddenly summoned to the Abyss Realm, a brutal world where only the strong survive.After 500 years of Endless battle with his Guardian Cerberus named Huno and Hydra named Silla, Seojun finally reclaim the Realm.Ding![Congratulations Host! You have max your level! LV. 999,999]Ding![You have obtained a Hidden Class: SSS-Rank Abyssal Tamer.][Title Acquired: Lord of the Abyss]Upon returning, 5 years had passed since his dissapearance and finds the world transformed. Dungeons and monsters are rampant, and people now possess skills and classes granted by a system called global system Where Earth transformed A Game into Reality.People granted is known as the Awakeners and Seojun, protected by his Infinite system, rejected the global system. He is classified as a glitch—a Non-Awakened by the Global System but his level just reset to 1.