Bokutachi wa Benkyou ga Dekinai!

Synopsis

Rizu decides to visit a salon owned by the eccentric Ms. Karasuma who, after learning Rizu is meeting a boy, changes Rizu's hair, eyelashes, makeup and clothes. Nariyuki doesn't recognise her when she sits next to him so he thinks she is a stranger trying to flirt with him, while his reaction makes Rizu think her makeover has improved their relationship. Nariyuki asks about the book she is studying, The Changelings and her confusion reminds him of Rizu, whom he admits he finds cute. Rizu asks his opinion of her new look. Nariyuki misunderstands and praises her study skills, angering her. Rizu invites Nariyuki to her house and he agrees, intending to lecture her parents about their daughter inviting boys over, only to finally realises she is Rizu after meeting her angry father again. Despite learning vocabulary and grammar Uruka has no confidence in speaking English so Nariyuki decides they must speak English all day. While playing with a lost puppy Nariyuki sees Uruka's panties, forcing him to defend his honour in English. Uruka is asked by two English men to a party. When Nariyuki protests they ask how he knows Uruka and he mispronounces in English, making it sound like Uruka is his girlfriend. Uruka works out what he said in English and flees in embarrassment.

(Source: Wikipedia)