I won't be able to translate each chapter word for word, but I can make summaries like the one below. Please give me some feedback. Thanks!
From the last chapter we know that Tsumugi still doesn’t feel comfortable about her body and thus thinks that nobody could ever love her. Tagami asks her how she still feels like that even with him by her side. He wonders how many times he has to tell her that he loves her for Tsumugi to understand and love herself. Tsumugi says that Tagami is a special case; however, he ends the chapter by asking if that meant she would believe it if he (as in Hyama) were to tell her that he loved her.
Now with the beginning of this chapter, Tsumugi continues to believe that Hyama could never fall in love with her, but Tagami thinks otherwise. Tagami tells her to try imagining it (Hyama confessing to her) for herself. She does and realizes something, but she hesitates to reply to Tagami when he asks what she has become aware of. Before she can say anything, Tagami walks out of the room, telling her that he’s had enough and that she doesn’t have to think about it anymore.
Next there’s a scene where Tsumugi’s friend Tomo, who is preparing for exams thanks to Tsumugi’s encouragement from the previous chapter, falls in the hallway. Seiji asks if she’s okay and compliments her hair, etc. Basically Tomo’s in love with this guy now, haha.
Anyway, Tsumugi’s at home eating dinner, but she has been spacing out thinking about what happened. She regrets not having gone after him as he was leaving and now doesn’t know what to say. She does tell herself that she has realized one thing after trying to envision Hyama confessing, and that is she didn’t feel any better after hearing him say those words.
After, we see Tagami brooding in a corner of a room with Seiji. Seiji tries guessing why Tagami is acting like this and first asks if it’s because he and Tsumugi broke up, since he's always doing annoying things to Tsumugi, haha. Seiji takes a second guess and asks if he did something to make Tsumugi angry. Tagami replies that the angry one is him. He didn’t get the answer he wanted from her. Seeing her so troubled by his question annoyed him to the point where he had to get away from her, otherwise he may have hurt her. But in the end he’s most annoyed at himself for acting that way.
Seiji describes Tagami as someone who always wants, even though he should be glad that the person he desires loves him back, since this kind of miracle doesn’t happen to everybody. This miracle may disappear little by little as long as there is a greater desire behind it all, no matter how hard one tries to hold on. Tagami comments on how troublesome jealousy is. Seiji calls him an idiot, saying that he has “first world problems” (a common translation for 贅沢の悩み online, haha) and should do his best to make sure he doesn’t regret anything.
Now at school, Tsumugi states that she hasn't contacted Tagami for the past three days, and neither has he. She doesn’t like how they’ve been apart for so long. Then her friends appear, talking about studying and stuff, but Tsumugi’s only worried about Tagami. Then in the crowd of students, she spots Hyama but covers it up from her friends by hastily asking the time, even though she has her own watch on her wrist. Then a teacher announces that the buses are here (I think the 3rd years are going on a school trip). Tagami is practicing shooting when he hears the buses.
On the bus, we learn that Tsumugi has been wondering about the reason Tagami is angry and believes that he must have realized that the answer is something unable to be answered (from 答えられないコトが「答え」なんだって). Pretty cryptic. The chapter ends with Tagami saying, “take care” (to Tsumugi, who is going on the trip).
Sorry for the wall of text and also if there are mistakes in my translation (especially the “miracle” thing)! Hope this helps :)