Receiving an overtaking with 〜れる


Grammar Explanation

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Chino watches as her “grandpa” bread is overtaken in growing by Cocoa’s and Chiya’s breads. (“Grandpa” received being overtaken by Cocoa’s and Chiya’s breads.)

チノ:
「おじいちゃんがココアさんと千夜さんに()かされました!」

()かす‘s negative stem is ()かさ. Append れる for ()かされる.