Days with the demon queen

Ronnie, a college student with a boring life has everything around him change when his whole world is turned upside down by a woman he accidentally summons while trying to summon a magical familiar as a game. His peaceful and tranquil days are disrupted as he tries to help her fit into human society while also searching for a way to break their bond. Hell further breaks loose when he discovers that his familiar is indeed the demon queen and mysterious forces start trying to eliminate him for reasons unknown. He struggles to protect himself, adjusting to having a demon queen in his life, and understanding his growing feelings for her.