One day Diavolo asked Lucifer to attend some business in Netherworld. Lucifer was sad because he wanted to spend some time with Yuki (MC) since he was very busy with his paperwork lately which Diavolo had given to him. Diavolo notices his sadness and he promises that he will send him for a nice vacation. Will Lucifer agree to this? (Obviously he will say yes as Diavolo is his lord and the next Demon King) Will Lucifer convince Yuki for this? (Because he promised her) They don't have any guesses (except Barbatos) that something (or someone) is waiting for them.
7 parts