Guys

My interpretation is that hee seo planted a bomb in her car and she had a flashback to the day she killed the guy. And basically the car blew up with him inside. I'm guessing when hee seo told taekyung he would reciprocate he meant this. But i dont think hes dead. Anyways taekyung wakes up and doesnt find him (obv) and he goes ti the cuty to look for him and the his brother finds him and a year later he's reporting about the case to people.

Oh my god, thank you, now I can understand that..

Phew okay, i js reread what i wrote and i had so many typos