こんにちは guys I'm a new ファン so I don't know much about the boys but I've noticed that yong-hwa oppa seems happier in his old concerts and I was wondering If something happened to make him feel sad .... can u answer me please?

i dont know too why he's sad, but if we translate his song in can't stop album, we know if the many lyrics meaning someone feel broken heart,, i dont know who's will broken ハート, 心 in cn blue boys but the song and the lyrics really mention if someone feel broken heart,,

actually I am also very curious about what made him like this

image CR as taged

Yes, I think he loved his virtual wife, Seohyun. He even made 2 songs for her when their marriage. After the WGM had ended, he made a song for Seohyun about his late 愛 confession to her, he loves Seohyun.