ingenuously

/ɪnˈdʒɛnjuəsli/
adverb
  1. In a way that is honest, innocent, and trusting, often showing a lack of experience or suspicion.
    • He ingenuously admitted that he had never heard of the famous singer.
    • She ingenuously asked the stranger for directions, not realizing he might be dangerous.
    • The child ingenuously offered to share his lunch with the new student.