Lillith's Things

I have a question, I read this yaoi long ago and srl, I can't sleep if I couldn't find the name of the manga.
It's about the young boy who is a student, lied that he's in college. He meet other balck hair beautiful boy by social media, they went on a pinic, they "have fun" outside. The student gifted black hair boy a little fox, cheap, but he said that all he could buy for him. He named the toy fox like black hair boy because it look like him. They break up, and then they meet again, he said he being bad and want black hair boy to punished him as he could do with the black hair boy.