Mob kara Hajimaru Tansaku Eiyuutan

Kaito Takagi is a low-status high schooler, considered nothing more than a background character in his own life. He spends his days as a low-level explorer, hunting slimes in the dungeons that have appeared all over Japan, earning pocket money while admiring his childhood friend, the class queen, from afar. His mundane routine takes a dramatic turn when he encounters a rare golden slime. After defeating it, Kaito discovers an extremely rare item worth hundreds of millions: a card that can summon mythical beings.

Deciding to activate the card, Kaito summons a beautiful warrior maiden with unparalleled strength. This unexpected turn of events gives him the opportunity to rise above his ordinary life and become something more than just a background character. With his newfound power, Kaito embarks on an adventure filled with modern fantasy and battles, aiming to transform from a mere mob character into a true hero.