 If you liked
Watashitachi no Shiawase na Jikan
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 ...then you might like
Half & Half
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The main protagonists of these two series are similar in the sense that both of them don't like each other in the start of the series and are strangers who met in some unforeseen circumstances. The two manga are not very long and the art style are quite similar. Originality of the two stories cannot be ignored.