 If you liked
Wellber no Monogatari: Sisters of Wellber Zwei
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 ...then you might like
Appare-Ranman!
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Appare-Ranman! and Wellber no Monogatari: Sisters of Wellber Zwei both explore themes of revenge with supporting character Hototo (Appare) and main character Tina (Wellber), with an almost identical setup for their motivation: their parents were killed in front of them when they were younger by an unidentified man with the only clue as to his identity being a tattoo of an animal, so they set off in search of him to get revenge. If you enjoy stories with themes about revenge either would be worth watching.