 If you liked
Franken Fran
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 ...then you might like
Helen ESP
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Same mangaka; if you liked one, then you'll probably like the other. Plot-wise, they're significantly different but they have the same kind of feeling to it.
Franken Fran is more mature and contains a lot of gore, whereas Helen ESP is more lighthearted.
Helen ESP is authored and illustrated by the same mangaka, Kigitsu Katsuhira, as Franken Fran. Franken Fran is directed at horror and mature audiences while Helen ESP does not. In other words Helen ESP is a much tamer, enjoyable manga but still carries Kigitsu Katsuhira's style.