Ep. 4: Salah Paham Keitaro atas Janji Naru dan Kegagalannya dalam Ujian

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After finding out that Keitaro was actually a prep school student and not a Tokyo U student, the other resident were disappointed that he lied to them. Even so, they still let Keitaro stay as manager as long as he does work around the apartment. When Keitaro sneaks a peak at Naru's diary and finds out about a promise that apparently she made many years ago to go to Tokyo U, he starts to think that Naru could be his promise girl. However when Naru walks in and saw Keitaro was reading her diary, she became disappointed and starts giving him the cold shoulders. As it turns out, the promise was supposed to be to a man named Seta, even though Keitaro still doesn't know it yet. So Keitaro tries to make it up to Naru by impressing her on their latest prep school exam. While grading his own exam, Keitaro sees that he got the first 3 questions wrong and thinking that he failed, he ran away from the apartment. (Source: Wikipedia)