BOKU NO KOWARETA MASAYOSHI WA RUPU SURU ISEKAI DE AI TO TSUMI WO TENBIN NI KAKERU is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A survival fantasy where life and death repeat in a school that has been overrun by orcs and turned into hell! The school is suddenly transported to another world, where it is overrun by monsters and turned into hell. Okoyo Takumi, who lost his life while trying to escape with his beloved sister-in-law, Haruna, realizes that every time he dies he returns to the same time. Takumi is at the mercy of the monsters deadly siege and imprisoned in a prison of time that sends him back to the same time every time he dies. He continues to struggle, overcoming the rape and death of his loved ones time and time againAfter successfully hunting an orc, a fanfare resonates in Takumis mind. You have leveled up!