Sousuke's grudge against Kurama escalates into a full-blown shooting war on the streets of Namsac, but is it possible for him to fight this war all by himself? And every war has its share of casualties.

Satan, the Demon Lord of Wrath, plans on stopping Lucifer once and for all. She sets off for Earth to retrieve Beelzebub and defeat Lucifer. Lucifer is significantly weaker than Satan, but plans on accepting her challenge anyway. Maria watches from afar and tries to remain faithful to Lucifer, and Levi struggles against Satan. How will Lucifer overcome her final obstacle, and what will happen to the others?

Beelzebub, the Sixth Mortal Sin of Gluttony, is running underground eating parties when Lucifer decides to crash one of them. Beelzebub is challenged to an eating contest by Lucifer, but when they both eat as much as they can, Lucifer becomes ill and ends up in the hospital. Her magic should prevent her from getting sick, but she's severely weakened. Will her time in the hospital bring her some humility?

Lucifer is now up against the Demon Lord of Sloth, Belphegor. Belphegor gathers her followers online, working with Mammon. Belial asks Belphegor to put an end to Lucifer once and for all. Lucifer ends up getting sucked into Belphegor's game, along with Maria and Levi. With a battle for the virtual world ongoing, and tensions building between Maria and Lucifer, just what will happen?

Astarotte, the Second Mortal Sin, is a net idol with a decent following, but Lucifer is ready to take her on with her own performances. Lucifer has a different style than Astarotte, starts to outshine Astarotte. As the crowds get bigger, and more is on the line for both Demon Lords, just who will come out on top?

The gang travels to London to face another Mortal Sin, the Demon Lord of Greed. Maria finds a strange shop that sells a potion that purports to grant anyone their wildest desires. Lucifer makes haste to the shop's location, only for them to quickly fall into a trap, but will Maria and Levi be able to handle themselves once they're separated from Lucifer?

Lucifer, Maria, and Levi head towards Miami in search of a Mortal Sin that Maria has detected. Lucifer is now weaker after her fight with the Sins and has decided to take on each Sin, one by one. Lucifer is calculating the best way to fight against the Demon Lord of Lust, but Levi wants to do things her way, only for her to succumb.

Maria is glad she gets to see Lucifer again, believing that she's an angel, and then has her heart stolen by the Demon King. Lucifer forces Maria to follow her and lets her live a life of luxury. Meanwhile, Leviathan, who has strong feelings for Lucifer starts to get jealous over Maria because Lucifer won't pay any attention to her.

Totsuka Maria was praying in a chapel at Seiseki Girls' Academy when a black cross comes falling from the sky. On that cross, was a fallen angel, bearing the sin of pride, Lucifer. Maria attempt to tend to the angel, but the floor falls out and she disappears. Lucifer finds herself in the depths of hell, and runs into the Demon Lord of Envy, Leviathan.

The exams are over, and Rin invites Nadeshiko out camping again, but she’s fallen ill. Rin heads out to Nagano again, while Chiaki hangs out with Nadeshiko.

Despite upcoming exams, the OutClub continues to obsess about camping, doing maintenance on a bowl and skillet that Chiaki and Aoi had bought. Another camping trip is in the works.

At Lake Shibire, Rin gives Nadeshiko a scare with the story of a monster that may or may not live in the water. They have trouble starting the fire for the barbecue.

Rin buys a portable grill online, which Nadeshiko discovers. They decide to go on a weekend camping barbecue.

After a courageous battle against the temptations of the hot springs, the OutClub makes it to their campsite. Meanwhile, Shima Rin arrives at Takabotchi Highlands by herself.

The Outdoor Activities Club prepares for their first camping trip. They may have to improvise a little. Meanwhile, Rin sets out to camp in Nagano.

Nadeshiko gets wind that Shima Rin is camping at Fumoto Campgrounds. She invites herself to join, bringing a basket of hot pot supplies for them to enjoy.