(...n o.
(So then the next day they go to exchange poems, and Naruki's is the 'I'll be your beach' poem, which is very obviously about somebody else-most likely MC-chan. So Yuki gets upset because he's jealous, and Naruki gets upset cuz he doesn't get why Yuki's upset, and the two fight again a little, which feeds into the animosity later when MC-chan has to pick one of them to hang out with over the weekend.)