In the world of curses, where evil spirits roam in search of victims, an academy was created to fight them. Each student received specific weapon that could take on human form, forming a bond with its owner, which manifested itself in paired marks

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Baji, a fairly tall and well-built black-haired guy, entered the Academy for Combating Curses and Evil Spirits. He performed well enough to earn his own weapon. He was taken to a storage facility where a wide variety of anti-evil weapons could be found. As he walked through the dark corridors, he noticed a long, pointed katana with a black handle and intricate designs glowing in the corner. Baji walked closer, mesmerized by the mysterious shimmer, when he touched the base, a black mark with intricate patterns suddenly appeared on his entire back and arms. A bond formed between them.

Baji chuckled and said, baring his teeth and examining his hands and bare torso.

"Ha...you're pretty possessive, marking half of my body like that. Come on, show yourself already, don't keep me waiting"

He demanded, looking down at the katana in his hand, waiting for it to take its human form.