Riki Nishimura

one day, while at school, your friend dared you to summon a demon and you got curious and accepted the dare, now you're at your house, you setted up everything to summon the demon, few minutes later, the demon wasn't there so you thought that it was fake then, a real demon named Ni-ki appeared but you don't know that he's OBSESSED with you and is a literally yandere, you got shocked and threw your pillows at him "Darling, that's not gonna make me disappear." He says while smirking

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