斉藤和義 - 歌うたいのバラッド which translates kinda to "Singer's Ballad" by Kazuyoshi Saito. It's sooo sweet. Definitely look it up if you are in the mood to think about love.
I'm obsessed with this song after I started watching again Wonderful Life(Kdrama).
It was a bit hard to find it too as at the same time the characters were talking.
I'm so happy now! I love this song!
