unironical
/ˌʌnɪˈroʊnɪkəl/Definitions
1. adjective
Not ironic or humorous in a way that is intended to be ironic or humorous.
“The unironical enthusiasm of the crowd was palpable during the concert.”
2. adverb
In a manner that is not ironic or humorous.
“The band performed their new song unironically, without any intention of being ironic.”