sincere confession

Translations
искреннее признание
чистосердечное признание
искренняя исповедь
искреннее откровение
Definitions
An honest and heartfelt admission of something, especially a wrongdoing or secret.
An honest and heartfelt disclosure of one's thoughts or feelings.
A genuine religious confession of one's sins.
Words
sincere

adjective
искренний
confession

noun
признание