 If you liked
Mugen no Ryvius
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 ...then you might like
Kokoro Connect
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Kokoro Connect and Infinite Ryvius are both similar in that they amplify the angst and drama of youth.
Things are very emotional, and taken very seriously (although both shows also have a good sense of humor and plenty of romance, which is where half of the emotion stems from).
If you loved one of these shows for this reason, you will likely love the other one. I gave them both 9's, so personally I think they both are phenomenal.