Time rewinds to Kakeru and Yamato's elementary school days, when they first met each other. While their personalities are near-exact opposites, they grow closer with each day they spend together. Soon, Kakeru learns more about Yamato--that his father fell into a coma after an accident, and even about a certain secret that he's hiding...

Kakeru and Yamato have begun dating at last, but they’re still not quite used to the fact that they’ve gone from “friends” to “boyfriends.” After receiving an aquarium ticket from Fujino, who tells him to “go with his girlfriend,” Kakeru decides to invite Yamato on a fun excursion. But when the two bump into their friends on the way home, Kakeru is forced to confess the truth about their relationship…

In a magical academy for summoners, students combine impressive stores of magical energy with artful incantations to usher legends, great and small, onto the battlefield. Feil Fonaf, an eighteen-year-old farmer's son, may have had a rougher upbringing than his more affluent peers, but he's here to prove he deserves his spot at the academy as much as anyone else! And as luck would have it, his counterpart summon winds up being the legendary god-slaying beast, Pandora! ...There's just one problem.

Now that Chiaki and Hana have professed their affection for each other, the cute couple of chest compadres grow closer by the day! Their bond began with an appreciation for boobs, but the two lovebirds are no longer content to draw the line at busts. And as they broaden their horizons, the love lives of the other bosom buffs see some development as well! Will the girls all get their happily ever after?!