Shiho and Rina tell Nagisa that her horoscopes predicts a good week for her and that her lucky colour is yellow. Nagisa does not believe it, but after a series of good events, she decides to not study for her mid-term exams and instead rely on her luck. During the test, Uraganos attacks, and Nagisa, Honoka and Hikari fight him. At the end, they find another Heartiel called Intelligen, who was fond of Honoka's hard work. When Nagisa gets her test papers, she finds out that she scored poorly and that she was a fool for believing in luck.