After a while I realised the song is about making out, if you read the lyrics with having making out as a context you will definitely see it yourself. Then later it was pretty obvious that it was about making out. What you guys think? Let me hear your theories. Check it yourself:-
The song is about flirting with temptation to cross the line, and then giving in to it and realising you can't stop. The specific kind of temptation is really a matter of your own interpretation - pick your vice of choice. Anything from sexual temptation, to an illicit relationship, to drugs, murder, addictions of all kinds, theft, crime, stalker-ish obsession, etc. You can read all those things into the lyrics if you wish. Ultimately, it's a song about the human condition, and how we fail to control ourselves. Which is definitely a significant departure lyrically from most of TWICE's title tracks. Most TWICE songs are empowering. This is a song about disempowerment. I don't know if you want to call it a maturing of their style or not, though. While it's true that a sign of a youthful attitude (in contrast to a more mature attitude) is the contrast between positivity and (naive?) optimism versus a more cynical (adult?) recognition of one's failings, the story is still incomplete without a third song to come to an acceptance that failings or not, one must still live on. TWICE is now singing about more young adult themes, rather than youthful themes. If TWICE's endless positivity and optimism in their earlier songs is interpreted as "immature" or "childish", then this song represents "grown-up" TWICE having to confront their failings as young adults. But there is no resolution as yet in this song. ICSM simply presents the problem. We have yet to see a song that deals with the resolution, although one could argue that Feel Special represents a mature solution to how to deal with the problems of one's failures - rely on others to help. That is just one answer, though, and it's primarily dealing with the issue of self-worth, not self-control. Perhaps their next song or album would present the solution they have discovered.
