The Heartsleeve Fruit is a magical bean-shaped fruit that Macaron and Tiramy bought in Episode 5. The heartsleeve fruit is green in color and anyone who consumed it would be forced to reveal what's in their hearts in a span of a day. 

In Episode 6, after Macaron secretly fed Sento the heartsleeve fruit, Sento tried her best to fight the effects, and prevent herself from confessing her feelings to Kanie and the others.

Macaron putting the fruit in Sento's curry.

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