"Hanako-san, Hanako-san... are you there?" At Kamome Academy, rumors abound about the school's Seven Mysteries, one of which is Hanako-san. Said to occupy the third stall of the third floor girls' bathroom in the old school building, Hanako-san grants any wish when summoned. Nene Yashiro, an occult-loving high school girl who dreams of romance, ventures into this haunted bathroom... but the Hanako-san she meets there is nothing like she imagined! Kamome Academy's Hanako-san... is a boy!

Ryou is delighted to be reincarnated into the fantastical world of Phi, where he thinks he'll get to live a quiet life learning to use his newfound water magic. Going with the flow here, however, means something very different. Ryou is immediately pitted against the wild lands he winds up in and the slew of deadly monsters that call the remote subcontinent home. You'd think he'd forget about taking it easy when he's stuck fighting for his life, but lucky for Ryou, he's naturally optimistic, clever, and blessed with the hidden "Eternal Youth" trait. Twenty years pass in the blink of an eye, and each encounter along the way pushes him one step closer to the pinnacle of human magic. Little does he realize that's only the opening chapter of his tale. A fateful meeting soon thrusts Ryou to the forefront of history, forever changing the course of his life... Thus begins the adventures of the strongest water magician the world has ever seen—who also likes to do things at his own pace!

Two years ago, the death of Naoto Watari's parents left him as the sole caretaker for his younger sister Suzushiro "Suzu" Watari and forced him to move in with their aunt. So devoted is he to Suzu that he refuses to join clubs or even hang out with anyone, earning him snide comments and the title of "siscon" at his new school. But as long as Suzu is safe and happy, Naoto doesn't care what everyone else says. However, his sneering classmates may turn out to be the least of his worries. The sudden transfer of a girl named Satsuki Tachibana brings back traumatic memories from his past—a past she had a hand in making so unpleasant. Nasty secrets, unknown to Naoto, begin to surface with her arrival, threatening his new life.

"She" was supposed to be a beacon of hope. But now her anger and hatred have turned into flames of war and are about to engulf the people. Only Rhodes Island, a neutral organization, can stop Reunion's rampage and the conspiracy behind it. Amiya and the others head towards Chernobog's Core City, which is on a collision course with Lungmen. What fate awaits them there...