no, don't even think that!Σ(  ̄□ ̄||) it's already enough heartbreaking as it is ╥﹏╥
as you probably noticed, ch 2 is shown trough oikawa's mom pov. that last part about him being in a hospital was a time skip when they were 20 (it said so in the beginning of the ch, page 9). it is that time when they broke up and because of that oikawa ended up in a hospital, it is mentioned in ch1:
http://www.mangago.me/read-manga/haikyu_dj_gunjou_no_shashin/mi/mi_chapter-1/22/
like it said at the end of ch1, they get a happy ending(▰˘◡˘▰)
lmao no. He got married in the beginning, the last part was a time skip to show the journey to the hardship they both endured and the final decision to get to the place they are now (eloped). Relax, its a happy ending
So I’m guessing he’s Ganna die....