Dictionary / Vocabulary / 天真爛漫
てんしんらんまん
innocent; naive; artless; unaffected
Also written 天真らんまん、天心爛漫
天真爛漫なところが彼の唯一の取り柄だな。
Naivete is his only merit.
あの子たち、みんな天真爛漫ね。
They are all innocent children.