TheDragonSlayer

“Ah... foolish hero, come to slay me... Heed my command and kneel!”

The Demon Queen offered Ryuji half the world—however, he desired everything.  
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Ryuji Vincenzo, a misunderstood son of a female gangster, beats his teacher upon seeing him commit a crime against his friend’s girlfriend. Yet because of his looks, the school forces him to change schools instead of expelling him. 

However, on his first day of changing schools, his class gets summoned to another world. 

He gains a useful class, but the calamity star chooses him. The star signals future tragedy or conflict in the new world. Despite this, the king, although asking them to fight against the demon king, doesn’t threaten them and is quite likeable.

Thankfully, the students are all given the power to fight, and this new life looks up for Ryuji, who desires to make friends and find himself a girlfriend.

Ryuji himself is quite a handsome man because of his father, but his mother's strict rules make him a strange person who wants to connect with people. 

This leads him to help those who cannot fight who would die otherwise. He wields a massive axe and uses his talents to support the weak members of his class. 
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BATTLE JUNKIE PROTAGONIST
LEVEL SYSTEM
WEAK -> STRONG
HAREM
BEAST GIRLS
DEMI GIRLS
MONSTER GIRLS
MOB GIRLS
NO YURI 
NO NTR
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This novel is a repost, as I became ill when writing the previous version and fell behind too much.

Extra Harem: S-Rank Berserker in Another World

Ryuji stepped on the corpse of the fire-type lizardman, pulling his axe from its flesh. He turned on his feet before lunging towards the second two bursts of fire rushing across his sides. The heat burned his cheeks and shoulders slightly.

The light of the flames blinded him.

However, his eyes were not the only active senses. With his demonic-enhanced vision, Ryuji could see the outline of the rushing flames—lowering his shoulder, he smashed into a fire-type, slamming its back into the wall, the cold sensation of its scaled body pressing against his face, while the hot embers from its lips formed a ball beside his face.

Ryuji's hand grabbed the throat of the lizardman, tightening around the sac that seemed to enable them to create flames. The lizard struggled. A booming kick caught the side of his ribs, prompting Ryuji to release and roll on the floor before jumping back up and swinging his axe once more.

First Floor Boss Fight!