Hell's first human (Human male reader x Loona) +18

While coming home from imp city, Joe and Lin were driving back to the farm when they saw a human who was four years old wondering around by himself they both didn't know how he got down here even y/n didn't know all he remembered they both decide to adopt him he gets along with millie and Sallie as his sisters. at age 14, he and Millie join I.M.P., and in the later years, y/n begins developing feelings for Loona, who has the same interest in him.