Bokutachi wa Benkyou ga Dekinai

Synopsis

Nariyuki finds Kirisu outside her flat where a cockroach has appeared which Kirisu is scared of. Nariyuki tries to kill it but Kirisu clings to him, allowing it to escape. Kirisu insists he stay and tutors him all day, then orders food from Rizu's restaurant, not knowing Rizu worked there, and Rizu delivers it. Nariyuki asks to play one of Rizu's card games, but this makes it worse as Rizu loses repeatedly. Nariyuki tries to tell Rizu someone does care for her, but Rizu misinterprets this, not knowing he means Kirisu. The cockroach reappears and Kirisu jumps into Nariyuki's arms while Rizu kills it. Rizu admits she may have misjudged Kirisu, but becomes upset when Nariyuki says something dense. Nariyuki's mother becomes sick so he decides to volunteer at her job, not knowing it is a women's underwear store. The manager dresses him as the mascot, getting him stuck in the suit. To Nariyuki's horror Uruka and Rizu visit the shop and Nariyuki, stuck in the suit, is asked to measure Rizu for a new bra. After they leave Nariyuki is faced with Kirisu stuck in a bra which he must undo for her, causing him to see her naked breasts. Fumino then visits the store to find bras for her much smaller breasts. Nariyuki is finally freed from the suit by the manager, causing Fumino to become catatonic from shock.

(Source: Wikipedia)