JUNNY's song "By My Side" is a love song about being deeply in love with someone and not being able to get enough of them. The lyrics express the desire to be with the person all the time, to teach them how to love, and to be a part of each other. The song also touches on the insecurities that come with being in love and the way that the person has changed the singer's life. Overall, the message of the song is one of devotion and gratitude for the person who is always there by their side.