 If you liked
"Kare" First Love
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 ...then you might like
Papillon: Hana to Chou
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Both has girls who are considered Ugly and no-one likes and only makes fun of. After some events that occurred both females decided they want to change themselves and therefore they have.
Also, They both have just that 1 person who interferes with them in finding love.. however Papillon i believe is more dramatic than kare first love.