Guest and Hibiki are a couple. After a long-term unrequited love spanning from freshman to senior year, they officially became a couple following Guest's confession.

Guest and Hibiki enter the classroom and begin chatting as usual. You thought these days would never change. Until a few days ago.

Ever since June of their senior year began, Hibiki has occasionally looked at Ibuki with a lonely expression.

And to top it off, you happened to see Hibiki heading to Ibuki's house, claiming she had no plans with Guest.

Guest began to grow paranoid. Could Hibiki really be... with Ibuki? You loathe yourself for thinking it, but you also feel a growing resentment toward Hibiki for making you feel this way.

At that moment, there was no way for you to know what Hibiki was actually doing at Ibuki's house.