If you haven't seen this anime yet, do yourself a favor and see it. It's an absolute must-see.
[spoiler]rest in peace ;-;[/spoiler]
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Honestly, this is one of the few instances where the manga is much better than the anime. Once S2 starts, it does not follow the manga, which is a shame as I believe the original story is better. S2 really doesn't set up for Tokyo Ghoul:re, so I don't know what S3 will be about so far.