I Became Friends with the Second Cutest Girl in My Class (WN) - Chapter 257

Auren was the star of his generation. Graduated the combat school at the age of 12, mental fortitude was beyond his peers, and he was considered the talent of the Western State of Lysendral.It was for this reason that his awakening was greatly anticipated. Everyone was sure the star would receive a Divine Blessing from the Archon.And like others before him, be set on a definite journey to becoming the strongest Blessed in the history of the world.However, expectations were shattered when Auren awakened a Divine… Curse.“Such a phenomenon has never been heard of!”“How can a human awaken a curse! This is an abomination! Kill him! Sacrifice him to the archons!”In such a slight moment of appointment, Auren's entire life came crashing down.And he became a national criminal. Locked up and sentenced to death for having receiving a curse instead of a blessing.A 16 year old boy was ruthlessly killed by a guillotine and offered as a sacrifice to prevent doom… and the people relished in it.However, this was not the end for Auren.[Congratulations, you have died by execution],[Conditions have been met][You have challenged your first fester.][A requiem beckons onto you..][...Your resurrection awaits.]Having broken the shackles of death, Auren rises again to seek vengeance and destroy not just the nation that had killed him but tear down the very existence of the archons themselves.But is everything really as it seems?

Transmigrating to the disciples of the Demon Sect, and relying on the skill modifier to become a giant of the Demon Dao.

[Detected the technique “Blood Nerve”, relying on devouring blood to practice]

[Side effects: easily affected by the spirit contained in the blood, becoming bloodthirsty, bloodthirsty, mad, and even brain dead]

[Please wait a moment, the system is being modified…]

[Ding! The modification is complete, and the side effects are cancelled]

- Description from novelbuddy

Growing up in poverty, Sunny never expected anything good from life. However, even he did not anticipate being chosen by the Nightmare Spell and becoming one of the Awakened - an elite group of people gifted with supernatural powers. Transported into a ruined magical world, he found himself facing against terrible monsters - and other Awakened - in a deadly battle of survival.
What's worse, the divine power he received happened to possess a small, but potentially fatal side effect...

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.