 If you liked
Konjiki no Gash Bell!!
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 ...then you might like
Sumomomo Momomo: Chijou Saikyou no Yome
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Basically in the beginning of both shows the protaginist was a bit of a wimp for his smarts and felt that people who bullied him were inferior to him.Then one day all that changes when they meet an unwanted partner who somehow gives them the courage and strength to fight back and learn what it means to stand up for yourself, and they slowly forge a bond with their partner that cannot be broken. Also both of them are pretty hilarious. :D