After watching Love Alarm season 2, I fell in love with this OST!
The song was not released officially yet, I took it from this channel :    • Giving – Ian Hug (OST from Love Alarm...   (thanks!)
The lyrics may also not be 100% accurate, forgive me for any mistake

It's Ringing 연경이 Lyrics video :    • 연경이  It's Ringing [LOVE ALARM 2 OST]...  

I don't own the music or the video clips. I just did the editing.
The font used throughout the video is called "Blue Eyes" (https://www.dafont.com/blueeyes.font)