Isaac Netero is the chairman of the Hunter Association. Decades ago he sealed away Jed, a Hunter who had mastered the use of On, the dark "shadow" of Nen. Now On users have reappeared at the Heaven's Arena "Battle Olympia" tournament. For Netero, this is the last mission: to protect the Association and the world from a threat driven by hatred and the thirst for revenge. And he's going to need all the help he can get in order to succeed.

Prince Pearl, who has escaped from the glittering kingdom and is a little unconfident. In the absence of Pearl, terrible things happened in the kingdom, Shimajiro and his friends save the crisis of the kingdom. They are now going to an adventure to find the three keys with Pearl.

Plain, timid and obsessed with jellyfish, Tsukimi is a far cry from her idea of a princess. Her tepid life as a jobless illustrator comes complete with roommates who harbor diehard hobbies that solidify their status as hopeless social rejects. These wallflowers run a tight, nun-like ship, but their no-men-allowed-not-no-one-not-no-how bubble is unwittingly burst after Tsukimi brings home a rescued sea jelly and a beauty queen... who's actually a guy. When the threat of losing their cozy convent inspires this glamour boy to turn the neurotic entourage into a portrait of success, will Tsukimi take her chance to bloom, or will she end up a hot mess?

After Nanase's father drops dead due to a drug that causes temporal death for 2 days, she is named the president of his pharmaceutical company. Nanase endeavors to prevent her father's enemies from prematurely cremating his body before the drug can wear off and allow him to revive.