Isekai no Meikyuu Toshi de Chiyu Mahoutsukai Yattemasu

Satou Shiki, a Japanese present-day university student, is suddenly attacked one day by a slasher. When he open his eyes, he finds he has been transported to another world's labyrinth city. In that another world, he who was awakened to healing magic can do a lot of 'things'. (Source: MU)