You guys do realize that everything was a flashback. All the heartbreaking angst already happened before Jin and Hamura were reunited. During chapter 1 Hamura did say "So there's no lover" which implies that when Jin and Hamura met, Alex wouldn't be in Jin's life anymore. So, Hamura and Jin is more likely to end up together by the end of volume 4. I don't know, I'm just getting this from all the comments explaining what happened in the raws, I'm too scared to read it.
You guys do realize that everything was a flashback. All the heartbreaking angst already happened before Jin and Hamura were reunited. During chapter 1 Hamura did say "So there's no lover" which implies that when Jin and Hamura met, Alex wouldn't be in Jin's life anymore. So, Hamura and Jin is more likely to end up together by the end of volume 4. I don't know, I'm just getting this from all the comments explaining what happened in the raws, I'm too scared to read it.