If you liked
Glass no Kamen (2005)
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...then you might like
A3! Season Spring & Summer
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The two shows are about acting in a theater setting and both target a female audience.
If you liked
Battle Royale
|
...then you might like
Life Is Money
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Both gather a group of people in an isolated place to make them fight each other in a lethal game. Both have a kind protagonist - and a love interest - who reveals himself to be more than just an average person. Both are also different from each other and that, my dear, is for you to read.
If you liked
Clamp Gakuen Tanteidan
|
...then you might like
City Hunter
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Both mangas are similar in the way that each "missions" are acceted only/mostly if the victim is a girl. Both main characters are womanizer, but if Clamp Gakuen Tanteidan targets a young public, City Huner targets an older public (teenagers/young adults).
If you liked
Kamikaze Kaitou Jeanne
|
...then you might like
20 Mensou ni Onegai!!
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This has a more fantasy side, it's a magical girl Shoujo, but if you were able to like 20 Mensou ni Onegai!!, you should definitly like KKJ better. As for the theme, it's the same : a thief always being able to escape.