Just a few days ago, the singer delivered the good news that he will be getting married with his girlfriend, racing model Lee Eun Hye, this coming May 19. Lee Eun Hye is also currently pregnant, which means the couple has some "studying" to do on babies!

Roh Ji Hoon wrote via Instagram, "If you don't know, you gotta study. Someone teach me. I need the help of an expert! #Father #Mother #Encyclopedia #Help #Study."�

While Roj Ji Hoon is smiling down at a copy of 'The Great Encyclopedia of Pregnancy, Birth Giving, and Child Raising', Lee Eun Hye seems to be flipping through another book on first-time pregnancies.�