Transmigrated as side character, I will steal all the heroines - Chapter 9: Study Demon

Cassian Ven Dyke, the bastard son of a powerful ducal family, grew up in the slums of Veldora under the care of his father figure, sword master Russel. When Russel passed away, Cassian was left with only a silver necklace as his inheritance. After putting it on, Cassian was attacked by three psychotic thugs who tortured him in an attempt to steal the necklace. Refusing to give in, Cassian was ultimately stabbed through the heart with the very same necklace. Instead of dying, he mysteriously vanished as the necklace lodged itself in his heart. Just before disappearing, he heard an eerie message echo in his mind:[True mana detected. Origin: Human...][Human detected. Compatibility with system: Confirmed.]

Maria is a werewolf of the Veilwood Pack, where every woman is born with a gift. But with her twenty-first birthday drawing near and no ability to call her own, her family arranges a marriage that feels more like a cage than a future.On the run from a fate she refuses to accept, Maria narrowly escapes a predator who wants to claim her for himself. Shaken and desperate, she stumbles into the arms of another man whose eyes burn with recognition—her mate.But the predator is still out there, and he wants Maria just as much.Torn between the mate who awakens her heart and the danger that tempts her into the shadows, Maria finds herself desired by two men who will stop at nothing to claim her.Love, obsession, and destiny intertwine, and her choice could cost her everything.

Leon and his father, Artorias, are the last remaining scions of a once powerful and illustrious family of lightning mages. After barely surviving an attack that destroyed their home fifteen years ago, they now live in the dangerous Northern Vales, a desolate wilderness far away from civilization. But those who want them dead are strong, patient, and relentless, and it is only a matter of time before they find the two they seek...

The invincible strongman who roams through the city by day and night, a supreme soldier king that moves across the urban landscape.