Mob kara Hajimaru Tansaku Eiyuutan

Takagi Kaito, a low status high schooler, your typical mob character so to say, was just a normal everyday explorer who hunted slimes every day in the dungeons that appeared in Japan, earning pocket money while admiring his childhood friend, the class queen, from afar. One day, a golden slime he had never seen appears before him. After he defeats it, he obtains an extremely rare item worth hundreds of millions as a drop, a servant card that can summon mythical beings!! After he makes up his mind and summons it, a warrior maiden with unparalleled beauty appears.
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Links:
- Web Novel (JP)
- Alternative Official Raw - Niconico