[This sort of thing has happened before, so it clicks within Shirou's mind much more quickly than one might expect. They were talking about alternate series of events, which meant only one thing.]
...We're from parallel worlds.
[Well, now Shirou felt horrible. Even if he loved Rin, he still genuinely liked Sakura and wanted her to be happy. And now she had to endure this.]
[action]
[This sort of thing has happened before, so it clicks within Shirou's mind much more quickly than one might expect. They were talking about alternate series of events, which meant only one thing.]
...We're from parallel worlds.
[Well, now Shirou felt horrible. Even if he loved Rin, he still genuinely liked Sakura and wanted her to be happy. And now she had to endure this.]
I'm sorry. I'm really, really sorry...