When Kazuma asks Rain if he’s technically been kidnapped and brought to Belzerg by Princess Iris, she asks that he indulge her desire to have a companion for a few days, as she rarely makes selfish requests of anyone. At first, Kazuma’s conscience directs him to comply, but after telling her some stories about his friends and his school in his old life, and she calls him “onii-chan” and repeats it several times at his request, he decides to stay.
Thus begins a period of Kazuma waking up in his cavernous chambers looking like a shoujo character, calling his butler by the wrong name and refusing to get out of bed so the maid can change the sheets. His days are spent playing with Iris, whether it’s hide-and-seek or tag or chess (which she’s very good at). And while perhaps Kazuma is getting something out of this by having an adorable royal little sister, it’s still very nice for him to keep her company.
That’s made clearer by the fact that she isn’t able to attend school, nor can she leave the palace grounds, without an armed royal guard, due to regular surprise attacks from the Devil King’s Army. But after a week, Kazuma’s friends come to bring him home, with Darkness asking Iris in as diplomatic and polite terms as possible that he belongs back in Axel with them. Despite Kazuma dispatching four spirit clones to subconsciously persuade her, Iris agrees to let Kazuma go home.
That’s not before she hosts a banquet in his honor, which turns out to be anything but due to the nobles not knowing who he is and being far more interested in courting the still-unmarried Darkness. That includes Lord Alderp, whose palace was destroyed in a previous season.
When Kazuma jokes to Darkness about being her lover, he’s exiled outside, but he’s soon joined by Iris. While her reasons for liking him sound like insults, they’re not: she’s valued their time together, and the fact he’s vibrant and honest and rude like no one she’s ever met.
He and Lalatina have even inspired her to possibly pursue adventuring once she’s older, as her family possesses innate skills useful to that profession. But before that, her offhand comment about a Robin Hood-like mysterious “noble thief” running lurking about the capital gives Kazuma an in to stay put in this cushy palace with servants.
He asks if he can investigate and catch the thief, and while Claire’s approval is hesitant, the nobles are extremely excited that someone, even an “unremarkable lad” like Kazuma, is on the case. Aqua and Megumin are also on board, but both they and Kazuma get a rude awakening, as they’re assigned to Lord Alderp’s residence for the mission.
In other words, no more palace servants or all-you-can-eat banquets. Instead, what Kazuma has done is given himself and his friends more work to do. That said, if they do manage to catch the noble thief, it will improve their rep in Belzerg. That can’t be bad, right?
RABUJOI - An Anime Blog 