In this collection of side stories: Clan and Yurika try their hardest in a triathlon in order to earn a special reward from a special someone, Harumi and Maki embark on an unusual journey of self-improvement on an impromptu day off, and... Shizuka and Ruth finally have their fated showdown?! Then, in a very special Harumi feature, we get a glimpse into what life would be like between Harumi and Koutarou if they started dating.

It’s the start of a new school year at Harukaze High. Excitement and change are in the air. Fresh faces abound, and there’s one girl in particular who really seems to get Koutarou’s attention. She looks so familiar, but no one seems to recognize her. Just who could she be? Meanwhile, Clan’s in for a schooling and Kenji’s going to have to learn how to deal with his precious baby sister growing up. Not to mention diplomatic relations between Forthorthe and Japan are just getting interesting...

It’s been two full years since Koutarou first started at Harukaze High as a freshman and a battle for his apartment turned his life upside down. A lot has changed since then. His former rivals are now his closest friends, and they’ve even added a few new faces to the group. Revisiting things like the inter-club obstacle marathon during the sports festival as third-years is going to be a wild ride, compounded even further by the danger lurking just around the corner...

After getting back from Forthorthe, everyone was hoping they could spend their days in peace for a change. But as if the politics of the official Forthorthian invasion weren’t enough, something very strange and very unsettling is starting to happen around Koutarou and the girls. One mysterious disappearance becomes two, and there’s no clear cause or end in sight. Can they figure out what’s going on in time, or will Koutarou end up just like he was in the beginning—alone?

Just starting high school, Koutarou is moving out on his own to take some of the burden off of his widower father. Lucky for him, he's found a room at Corona House. It has a great landlord, it's not too far from school, and best of all, it's dirt cheap. It really is perfect... except for the strange girls that keep appearing to try and take it over! But even as room 106 turns into a battlefield, Koutarou isn't willing to give up his apartment without a good fight. The invasion begins!

With things slowly shifting in their favor, the Reborn Forthorthian Army might finally be able to expose Vandarion for the traitor that he is. When backed into a corner, however, Vandarion reveals just how cruel he can be as his rage, his hatred, and his desperation push him to the brink of sanity. In their toughest fight yet, Koutarou and the girls will have old tricks, their friends, and even their own weapons used against them.

With the coup d’etat back home in Forthorthe finally reaching critical mass, Elfaria and Theia decide it’s time for them to return. Theia is reluctant to drag her friends into the politics of her homeland, but they’re just as stubborn as she is. They band together and set out for Forthorthe, but their enemies will make sure not even the trip there is easy. They all have a long, hard fight ahead of them—and this is just the beginning.