This Lord is Very Scientific - Chapter 1: At the Beginning, Using Math Problems to Slay Gods!

A man with a lifelong martial arts background, raised in Asia due to his family's profession, moves to the US for education and work. He discovers Historical Medieval Battles through a colleague and becomes deeply passionate about it. He trains hard and becomes skilled enough to represent his country.During a competition, his armor fails, and he's struck in the head with a two-handed axe, seemingly dying. But is this truly the end?

The strong are lonesome. Overcoming the loneliness pushes you to stand invincible at the top.

Pro-disciple of the Shaolin Temple on earth, Huang Xiaolong was reborn into a Martial Spirit world, carrying Hua Xia’s secret knowledge, the Body Metamorphose Scripture. In a Martial Spirit world, only those with Martial Spirit are able to train in battle qi and become a warrior.

Huang Xiaolong born with a heaven-defying rare Martial Spirit was mistakenly taken for common variant Martial Spirit during the awakening ceremony conducted by the tribe and thus sidelined. However, Huang Xiaolong with his common “variant” Martial Spirit again, and again displayed unnatural talent, defeating geniuses, shocking the clan and the entire Martial Spirit World

- Description from novelupdates

Hiro transmigrates and finds himself in the body of an orphan that’s about to be evicted from his orphanage. It wasn’t anything personal, but the orphanage’s policy doesn’t accommodate children who have reached the age of 16.From the gates of that humble establishment, Hiro slowly explores the facets of this world that was both familiar and unfamiliar due to its uncanny resemblance to his previous world—Earth.With his Daily Life RPG System urging him to excel in every aspect of his daily life, Hiro marks his presence in both the mundane and mystical circles of this new world.

The NPC sets out on a journey to defeat the Demon Lord, joined by beautiful girls he meets along the way.---This is an NSFW story, so if you're under 18, turn back now, son. No NTR, and no full-on Yuri. There might be slight Yuri—like girls kissing and stuff during threesomes—but it's not that kind of Yuri where the girls fall in love with each other while in a relationship with the MC.---