In this special collection of stories, new and old friends alike appear. Shizuka tells the story of how she lost her parents. She also comes to learn of the very special power that's been sleeping within her, and just what consequences that has for her... waistline? Yurika goes on a little quest to try and find herself, or rather, herselves. And finally, the story of how Koutarou knows Theia's mother.

Koutarou and company are left reeling in the wake of Ralgwin’s mysterious disappearance, but he isn’t the only cause for concern anymore. Maki receives an invitation from Rainbow Heart, which brings the whole group to Folsaria. All seems well at first, but intrigue and danger are brewing under the surface in the supposedly peaceful land of magic. An old enemy rears his head after ages, renewing a fight that Koutarou hopes to settle once and for all. Will he be able to claim a definitive victory this time with the girls’ help?

After Theia receives a distressing message about her mother in Forthorthe, she's forced to make what could be a life-changing choice. Nothing is simple, however, when it comes to the politics of a galactic empire.

Koutarou and the girls prepare to chase Ralgwin back to Forthorthe, but one critical mission remains before they can leave Earth behind again—they must oversee the welcome ceremony for the next wave of intergalactic transfer students. Little do they know that someone is watching their every move from the shadows, someone with a keen interest in both Koutarou’s sword and Nalfa... Indeed, the Gray Knight is getting dangerously close the group and the truth about what happened back in the ruins. Will their rematch with him be their final showdown?

Koutarou and Clan are working their way back home from their interstellar adventure, but they have to make a pit stop about ten years off from their intended destination. As luck would have it, they encounter a young girl right after they land. Worried that she might have seen their spaceship in action, Koutarou decides to dig a little deeper. Things take an unexpected and heart-wrenching turn, however, when he realizes he has more in common with this girl than he initially thought.

Koutarou has sunk into despair. He was given the agonizing choice of saving either Fasta or Ralgwin, with the other losing their life. As a result, Maxfern was resurrected, leaving Koutarou at a loss and full of fears. What will be the catalyst for his recovery? The girls of room 106 struggle to reach out to him, but it’s an unexpected friend who pulls Koutarou back from the edge. Once out of his slump, he resolves to take action against Maxfern. In order to find any leads on their enemy, Koutarou, along with Maki and Nana, infiltrates an enemy organization!

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!