Tensei Teido de Mune no Ana wa Umaranai

The series is set in a world where people can turn their desires into magic. Particularly strong magicians, known as the Adept, are tasked with protecting the world from threats. Konoe, a man who was reincarnated into this world, lives with the trauma of his past life and has become distrustful of others. His disillusion grows as he trains to become an Adept, his disillusion not going away even after becoming an Adept. However, following an encounter with a sick woman named Telnerica, his life changes, seeing Telnerica as filling the void that has long existed in his heart.

(Source: Wikipedia)