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I just recently heard of Doubt and read through it.

So what's your opinion? Who do you think the killer is? Personally, I think it's Mitsuki, teaming up with her father(?) and that tomorrow is maybe her mother's birthday. It would easily explain why Eiji's hand was cut off.

I think this is at least fun to read with a friend, issue by issue, and get into a debate on who's the killer and what clues have come up.