Codex entry
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Ren Haruki only wanted to summon a succubus.
It was supposed to be a stupid bedroom ritual. A joke, mostly. Maybe a desperate little miracle if the universe felt generous.
Instead, the ritual works far too well.
Ren is taken to the demon world by a noble girl far above his weight class and enrolled in an academy where every lesson can become a legal incident, every courtesy hides a trap, and every student seems to know rules he has never heard of.
At first, everyone thinks he is just an embarrassing human mistake being kept under supervision. Then the academy's magic starts reacting to him strangely. His voice makes spells obey too hard. His mark refuses to fit any known category. And the more the demon world tries to classify him, the more dangerous those answers become.
Surviving classes is hard enough. Surviving noble politics, ancient contracts, and the attention of people who see him as a problem may be impossible.
And when the one person helping him understand this world becomes a target because of him, Ren will have to decide whether staying harmless is still an option.