Keitaro Urashima promised a girl when he was young that they would meet up again at Tokyo University in the future. Sadly, in the National Practice Exam, Keitaro ranked 27th from the bottom. Knowing his grandmother owned a hotel, Keitaro intended to stay there while continuing his studies for Tokyo U, only to find out the hotel had long been transformed into an all-girls dormitory. Through an odd twist of fate, Keitaro eventually became the manager of the dorm, beginning his life of living with five other girls.

When a soul has committed irredeemable sins, it is removed from the cycle of reincarnation monitored by the Soul Society, and the gates of Hell open to condemn the soul to eternal damnation. From this place from where no one has ever come back, three tormented souls who refer to themselves as Sinners of Hell burst in Karakura Town, where a ruthless fight involving them against the substitute Soul Reaper Ichigo Kurosaki and his friends ensues. In the aftermath of the fight, Ichigo's sisters are abducted, with the aforementioned group's leader Shuren hoping to lure Ichigo to be finally freed from the chains of Hell. Helped by a Sinner named Kokutou, Ichigo and his friends head to Hell for a rescue mission. However, the Soul Society opposes the journey, in fear of threatening the balance between worlds. As the lines between friends and foes get blurred, Ichigo will have to face his most challenging dilemma yet—a decision that may well engulf the three worlds into chaos.

In his past life, Prince Lloyd de Saloum was a commoner who could not become adept at magic, no matter how knowledgeable or obsessed he was about it. Now reincarnated into his current royal lineage, he receives a body with seemingly endless mana, making his desire to master all things arcane attainable. Moreover, as the seventh prince of the kingdom, Lloyd has no claim to the throne, allowing him to nurture his abilities as freely as he wants. Unfortunately for Lloyd, ancient seals that imprison powerful demons begin to break down and release the horrors within, endangering the peace. With these monstrosities roaming around, Lloyd's overwhelming magical prowess is the ultimate weapon that can neutralize these threats before all things descend to chaos.

An apocalyptic event has ravaged Japan, leaving nothing but endless sandy plains behind, and a strange rusting disease terrorizes the remnants of civilization. According to the government, the horrific state of the new world is the result of mushroom spores being spread by the likes of Bisco Akaboshi, labeled the Man-Eating Mushroom. But Bisco would beg to differ. In reality, he is a Mushroom Protector, determined to uncover the legendary Sabikui mushroom—said to be the ultimate cure for the rusting disease. Joining him on his quest are his giant crab Akutagawa and the kind doctor Milo Nekoyanagi, who is actively searching for a rust poisoning treatment for his sick sister. Despite the prejudice aimed toward him by the common folk, Bisco refuses to give up on his quest to purify the rotting world.