天てん真しん爛らん漫まん

na-adjective, noun

innocent; naive; artless; unaffected; genuine; childlike

Describes a person or behavior that is pure, without guile or pretense, often with a childlike simplicity. Can be positive (genuine, unaffected) or slightly negative (naive, unsophisticated) depending on context.

• 彼かの女じょの天てん真しん爛らん漫まんな笑え顔がおに心こころが和なごんだ。

  Her innocent smile warmed my heart.

• 子こ供どものように天てん真しん爛らん漫まんに振ふる舞まう。

  He behaves with childlike innocence.