Ah, Hinako, it seems like you were feeling a bit jealous there! 😄
Context: "On the way back, they were forced into two pairs since the train was full. It turned out that Asahi likes a K-pop group/singer called "Mevius," and Seira got curious about it. They were talking about it until they fell asleep. When Hinako saw them sleeping against each other's shoulders, she felt annoyed and accepted Tsukko's suggestion to relax and sleep on her until they arrived at their destination."
Well, I machine-translated the text from Italian to English, so it might not be 100% accurate.
