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 knelt in the cold, devoid of movement. His mind became distant, listening to the echoes of water and blood dropping around him, weaving into a peculiar melody that soothed his aching body.

Because of his body's resilience, Ryuji braced himself for the aggression by regulating his regeneration and rage.

With his unique healing ability, he had the power to dictate the pace of his healing, effectively defending against his adversaries' unrelenting assaults. Now they left. He devoted all 120 rage points to damage reduction and healing.

The sound of bones adjusting, meat rejoined, and flesh healing filled the wet room, adding to the melody and forming a beautiful concerto depicting Ryuji's resilience.

Alan - He Who Believes In me