 If you liked
Mori no Majuu ni Hanataba wo
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 ...then you might like
Chishio no Iro ni Saku Hana wa
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Both stories revolve around the theme of the love between a human and a monster.
Both female protagonists are flower-type monsters.
While the male protag in Chishio no Iro is more capable with greater strength and fighting skills, the male protag in Mori no Majuu is more of a weakling who can't survive in the jungle without the help of the flower girl.
Both novels are one-shots that are incredibly good.