After a rocky start, Iris is getting along with Kazuma splendidly, and she's even taken a liking to our hero and his boorish ways. Claire, however, is still not impressed, and she wants him as far away from the princess as possible. But Kazuma's grown attached to his new little sister, and no matter how low he has to sink, he's determined to do whatever it takes to stay by her side!

Luck be a lady tonight!Seeking financial support in the fight against the Demon King's army, Princess Iris visits the neighboring nation of Elroad to meet the prince: her husband-to-be. But Kazuma won't hand over his little sister to just anyone! Scratch that. He won't hand her over, period! Posing as her escort, he tags along in an attempt to derail yet another wedding (and rake in the dough). But no sooner than they arrive in Elroad are they informed that the engagement is off, and there won't be any financial support at all! And so it falls to Kazuma to use his wit and insanely good Luck to milk the Casino Kingdom for all it's worth!

Game loving shut-in Kazuma Sato's life as a young schoolboy in Japan abruptly comes to an early end...or at least it was supposed to. When he opens his eyes, though, he sees a beautiful goddess that offers him a once in an after-lifetime chance to be reborn in a parallel world. The catch is that the world is violent and threatened by a growing evil! Fortunately, he can choose any one thing to bring with him. So he chooses the goddess, Aqua! And so his adventure with his gorgeous companion begins--if he could just get enough money and food to survive, keep his goddess out of trouble, and avoid grabbing the attention of the Demon King's army!

Kazuma Sato is a video game-loving shut-in-or at least he was, until a humiliating traffic accident brings his young life to an untimely end. But after his death, a beautiful girl claiming to be a goddess invites him to enter another world and gain some respectable perks in the process. But Kazuma's choice is going to have serious consequences for the goddess and the dead man alike...

A fateful encounter! In its endless war against the Demon King's army, the capital faces a new crisis in the form of the enemy's latest general-the dark god Wolbach. When Magumin learns of Wolbach's approach, she drags Kazuma (against his will) to a fortress just on the edge of the front line so they can mount a defense. But to their horror, they discover that Wolbach is also a user of Explosion magic! Just what is this Explosion master's relationship to Megumin..? And what could she possibly want with Chomusuke?!

MAY THE BEST GODDESS WIN! It's time once again for the annual Eris Appreciation Festival, and everyone in Axel Town is in high spirits... except Aqua. In her mind, it's totally unfair that Eris gets an entire festival thrown in her honor while she doesn't. So Aqua announces that she'll be having an Aqua Appreciation Festival at the same time, and both Kazuma and Chris get dragged into helping out. And once the festivities are underway, Chris also ropes Kazuma into helping her infiltrate a noble's mansion in pursuit of a new Sacred Treasure: a legendary suit of armor...that can talk?! Two festivals plus one mysterious suit of armor equals chaos for Kazuma, and it won't end until the whole town gets caught up in the madness!

Kazuma and Airis have switched bodies! Things couldn't get any worse...or so one might think, but the two of them are actually enjoying their new lives! But can Kazuma be trusted to act appropriately in such a delicate situation? ...Probably not!