Nariyuki is on the verge of failing PE class! Uruka tries teaching him how to swim, but she’s so bad at it that it doesn’t do any good. Mafuyu is watching over them but becomes so frustrated that she gets into the pool herself and takes Nariyuki by the hand...
　Encouraged by Mafuyu from the pool incident, Uruka goes on to win a national swimming conference! There’s even talk of her going to university abroad. Unable to break that news to Nariyuki, she asks Fumino for advice when the two are at a diner. But when Nariyuki himself appears, Uruka suddenly hides under the table!