Fics like a treatise on the sun

In 1543, Copernicus discovered that the Earth revolves around the Sun, but it took more than a century for the idea to become accepted in society. In 2013, Miyuki Kazuya discovers that somehow, he has fallen into the orbit of one Sawamura Eijun. It still takes him approximately two years to come to terms with this fact.

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2. Spring Into Summer by writingscribbles (ダイヤのA | Daiya no A | Ace of Diamond)
3. playing detective by sunbaemint (ダイヤのA | Daiya no A | Ace of Diamond)
4. The path we walk by WindsOfTime (ダイヤのA | Daiya no A | Ace of Diamond)
5. Summer and Summer by fluxfiction, naiishu (ダイヤのA | Daiya no A | Ace of Diamond)
6. The Trajectory of Laughter by PKSamurai (ダイヤのA | Daiya no A | Ace of Diamond)
7. comments and kudos appreciated by rekamohcs (ダイヤのA | Daiya no A | Ace of Diamond)
8. Take A Hint by PiningTsukkiEnthusiast (ダイヤのA | Daiya no A | Ace of Diamond)
9. Extra Inning by Karmasprings (ダイヤのA | Daiya no A | Ace of Diamond)
10. Sawamura's day off by Theabeanie (ダイヤのA | Daiya no A | Ace of Diamond, Haikyuu!!)
11. Reluctant Revelations by corteae (ダイヤのA | Daiya no A | Ace of Diamond)
12. Get it Together! by espanyeol (ダイヤのA | Daiya no A | Ace of Diamond)
13. I Ship It by rekamohcs (ダイヤのA | Daiya no A | Ace of Diamond)
14. for old times’ sake by sunbaemint (ダイヤのA | Daiya no A | Ace of Diamond)
15. how to pitch from the outfield by Maven_Fair (ダイヤのA | Daiya no A | Ace of Diamond)
16. Shut Up And Kiss Me by Vixenfur (ダイヤのA | Daiya no A | Ace of Diamond)
17. Kissing You by espanyeol (ダイヤのA | Daiya no A | Ace of Diamond)
18. Unkept Promises by kazuyaceijun (ダイヤのA | Daiya no A | Ace of Diamond)
19. bill and coo by sunbaemint (ダイヤのA | Daiya no A | Ace of Diamond)
20. Sugar Rush by oiivkawa (ダイヤのA | Daiya no A | Ace of Diamond)