I'm looking for a novel with a time loop as the main plot. Here's a link to Mother of Learning: https://www.baka-tsuki.org/project/index.php?title=Mother_of_Learning
I would look on /r/rational, where similar stories with rational main characters and thought processes gather. (Mother of Learning is one of the top stories on that subreddit)
http://www.novelupdates.com/series/utsuro-no-hako-to-zero-no-maria/ I haven't read it yet, but it seems to fit your criteria.
Aren't the loop plot only the first volume? The remaining is mystery and death game. But this is brilliant though.
It's not a time loop though. I don't remember the second volume has time loop element in it. But I only read until 3 volumes though not sure if there are another revelation after that that say the entry story is time loop without reader noticing. If there really is, I am not surprise this novel is too mystery and too complicate to predict.
Why are you asking me when I haven't even read it yet?! ...Ignore that, I just wanted to say it. I'm wanting to read it, but I haven't gotten around to it due to reasons. Honestly though, even if it only has a time loop in one novel, it's good that they conitnued the story as most don't go past it. *stares at All You Need Is Kill*