Arasaa Majutsushi no Yurui Harem Life: Isekai to Gendai wo Ikiki Shite Nonbiri Kurashimasu

Kagamihira, remembering his past life as a powerful mage in another world, acquired immense magical abilities. However, these powers proved useless in his current reality. Deciding to return to the world of his past life, Kagamihira—now going by the name Tyler—began his adventurer's life. Tyler intended to live a carefree existence, using his powerful magic. One day, however, Elza, the leader of the city's strongest party, "Valkyries," approached him, claiming, "I know your secret…"