 If you liked
Psyren
|
 ...then you might like
unCassandra
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Ann Cassandra is a very short manga that utilizes two main characters' abilities to prevent the future, just like Psyren. However, Psyren eventually becomes more mainstream with battle scenes and powers and thus is longer, whereas Ann Cassandra is less so, completed, and simply documents the adventures in "breaking predictions." I would recommend Psyren or Ann Cassandra to someone who is interested in the characters' attempts to change the future.