Isekai Meikyuu de Harem wo 12

The story centers on high school student Kaga Michio. Wandering aimlessly through life and the Internet, he finds himself transported from a shady website to a fantasy world — reborn as a strong man who can use "cheat" powers. He uses his powers to become an adventurer, earn money, and get the right to claim girls that have idol-level beauty to form his very own harem.