Taku has a lighter he considered as his lucky charm. He said he lost it once but he found it again
(also it's kinda ironic that joowon is the one passing him this lighter back to him here lol)

I might be reaching here but his red camera strap might be a metaphor for his red string. He didn't let Leo touch it once because idk maybe it actually belongs to someone else
The biggest clue would be the fact that haesoo and taekyung actually had their (fated) encounter TWICE before their officially met.
just like his lighter, taku wants to believe haesoo will come back to him no matter how they separated.
and i just realized that haesoo and taku tuned in the same radio show at the same time lol like fr soulmates behaviour
disclaimer, Im doing this for fun and for MY own enjoyment so just take it as it is. If these bothers you so much, block and mute me.
and i definitely dont force anyone to agree or disagree with me. not taku or jw stans.