DxD New Dragon!

Azazel and Haruto were in a dim lit room with dozens of monitors around them as the main light source. Haruto was rhythmically tapping away on the keyboard in front of him while his father read a torn book with the words Longinus on it. " I'm telling you son, were so close to being able to create our own gear we just need to find the right materials!" Azazel said as he shut the book and turned towards his son. "Dad I already told you I'm only helping you research not develop more things. Last time we started a project it took 4 months to craft!" Haruto complained while still focusing on the monitor in front of him. "Well if you dont want to help me then why are you working on coding algorithms on storing high yield amounts of magic and data? hmmmm Haurto-kun?" Azazel added extra emphasis on the suffix to embarrass his son. Haurtos head smacked into the keyboard as he heard his father and his arms finally stopped working. Haruto hated being called a kid by his father and it made him embarrassed hearing his father call him that. "Dad, how many times do I need to ask you to stop calling me that." Haurto got back up from his embarrased position and refocused on his work in front of him. "The day you can beat me is the day I promise to stop calling you that my dear son." Azazel smiled and scruffed his sons hair a bit before returning back to more research.

A few days later Azazel and Haruto reached a stopping point. Both exited the lab and saw a pair of cold blue eyes staring at them. "Well, if it isn't my two favorite people." Yui said this but the boys heard no love in those words. Azazel looked away and put his hand on Harutos back to push him forward. "ah Yui dear your son is just a mad man when it comes to working he said we couldn't stop until he finished his work. I wanted to come up and spend time with you but he insisted we come back after we were done." Azazel gave Haruto an evil smirk. "Bastard!" Haurto thought to himself. "Mom it would have been a lot sooner if dad didnt keep trying get me to experiment with some of his inventions." Haurto looked back at his father who gave an angry face. "Rat" Azazel said to his son. "Bum." Haruto responded.