Pick up the Sickly Demon Queen at the Beginning

"Slow heat + development + comedy + sweet love + double yandere (double happiness)" A failed experiment, an encounter across dimensions. The down-and-out Su Jiu picked up the Demon Queen, who was even more down-trodden than him. The sweet love came too suddenly, and the queen's "punishment" was too harsh! "Are you the queen of the demon clan? Don't be ridiculous, except for the horns, how do you look like a demon clan?"