It references Alex Kaneko's "Poison". Poison is a figure of speech used in this song to allow the love to slowly permeate and settle into you until you do realize it was love after all.
I wrote this song about my friend's older brother that likes me romantically. This is shown from his perspective since he got insanely jealous when he found out about all the guy friends that I have, know me, etc. I suck at romance/relationships so I'm not sure what to do or how to proceed since our relationship is complicated. I see him as an older brother figure/friend and don't think I am capable of loving him yet.
This song is dedicated to my first love. We were together for seven years. Long story short: I found out he cheated and we broke up. From time to time, I still think about him and miss him but what we had is in the past.
English translated lyric from "Turtle" by Davichi that inspired this song: "I can't protect your anymore or love you anymore. It's my heartbreaking story"