Mamono Kurai Ranking Saikai No Boken Sha Ha Mamono No Chikara De Saikyo He (Dragon Novels) [Light Novel]

[Machine Translation] Essen, the lowest ranked adventurer of all time, has the gift of being a "demon eater. It's a gift that keeps him from getting sick to his stomach even if he eats raw meat from demons. One day, however, he was attacked by a demon and unintentionally bit its neck, which awakened him. He gains the ability to possess the power of the demon he bites and rises through the ranks! All in order to fulfill his promise to his childhood friend who aspired to be an adventurer with him.

冒険者ランキング万年最下位、エッセンのギフトは“魔物喰らい”。魔物の生肉を食べても腹を壊さないというだけの残念ギフトだ。しかしある日、魔物に襲われて思わずその首元に噛みついたことで覚醒。喰らった魔物の力をその身に宿す能力を得て、ランキングを駆け上がっていく!すべては、ともに冒険者を志した幼馴染との約束を果すために―。