 If you liked
Full Metal Panic? Fumoffu
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 ...then you might like
Danshi Koukousei no Nichijou
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Both take place in a Highschool setting and both focus on comedy.
Danshi Koukousei is about random events in the daily lives of the main characters, while Fumoffu is centered around a young soldier being unable to adapt to regular highscool life. But they both have great humour and should make you laugh.