My Status as an Assassin Obviously Exceeds the Hero's Vol. 2 (manga)

THE ASSASSIN HONES HIS FANGS

Transported to a world of swords and sorcery, Akira and his class found themselves endowed with heroic powers--but nothing was as it seemed. In a vicious betrayal, the king framed Akira for the murder of his own Knight Commander, Saran. Now Akira flees into the depths of a perilous labyrinth, following Saran's last order: to reach the bottom at any cost. Finding unexpected allies and enemies within those magical corridors, the Assassin sharpens his skills, waiting for the day he can take revenge!