Oga's family is seriously worried about Baby Beel's night crying, as it's causing everyone in the entire town to lose sleep. They try all kinds of things but nothing works. Oga heads to school, completely exhausted, as do the other students looking for a fight. Everyone ends up asleep, dreaming...

It's summer vacation at the academy and all of the students are going on retreats from the heat, except for Victorique, who is forced to spend the boring break alone there. However, after Kazuya turns down Avril's invitation, he pays Victorique a visit, bringing along the most recent goodies sent from Japan. Among them is the answer to the puzzle Victorique posed to Kazuya's second elder brother. Under the midsummer sun, Kazuya's thoughts go to earlier summer days in Japan.

The message sent by Princess Luna... What is her true goal? What is Prince's shocking decision? Level E wraps up with a final episode that goes above the diagonal of anything you could predict! Baka will be Baka, after all.

Himekawa lives by the motto, "there's nothing that money can't control." In order to get revenge on Oga, he uses the power of money to work behind the scenes in plan after plan to defeat him, but Oga keeps getting the upper hand somehow...

It's already the semi-finals of the Shop Tournament and standing up against Aichi is none other than Kamui! As the fight begins Aichi and Kamui don't hold back one bit, going at each other with full force! With that invigorating tension, they battle on!

A visitor comes to the academy and it turns out to be Jacqueline, wife of the police superintendent general and seemingly close acquaintance of Inspector Blois. Kazuya is entrusted with giving her a tour, but the innocent Jacqueline soon takes the reins, directing them to the library. There, Jacqueline encounters Victorique, and confides that she was at the center of a murder investigation several years before...

Shuichi is put in charge of the script for the genderbent play for the cultural festival, so he participates in practice, while staying in the nurse's office during the day. Doi improvisation on Shuichi's script is a surprising hit, so Shuichi grits his teeth and asks Doi to help with the script. Meanwhile, Saori invites Shuichi over to wear girls' clothes for the first time in a while. Things are almost back to the way they were, but nevertheless... Shuichi reflects as he looks at Saori's dresses. And finally, the cultural festival is here.

Prince Baka's younger brother and betrothed princess come to the Earth. Their goal is to perform the marriage ceremony and confirm the prince's place as heir to the throne. The prince doesn't want to become King, so he hides himself in Yukitaka's place... However...

Rose has been taken by Onyx. With Rose gone and the knowledge he hurt Rose, Ryuji passes his days as a shell of his former self. The dragon empress Maruga arrives to announce Onyx's dangerous intentions. When she forces Ryuji to make a decision, he finally finds a desire hidden deep within himself. However, Onyx and Sapphie already have plans to take the weakened Rose out of the country. The final battle for Rose is about to begin! With Rose gone, Ryuji passes his days as a shell of his former self. The dragon empress Maruga arrives to announce Onyx's dangerous intentions. Ryuji finally finds himself and heads off for the final confrontation.

A cat follows Oga home one day. Baby Beel challenges the cat for Oga's attention. Once the showdown is over, they are surrounded by stray cats, and Baby Beel stands tall to defend! This is the start of a friendship between 1 baby and 1 kitty.

The ultimate battle with the most powerful gaichuu, the Cabernet, wrecking havoc in Yuusari central, comes to a close. Lag stands up, together with the Heart of all of the friends who he's received and become entangled with.