Let me add a little sad scene for this. (This is a made up text i made and not a spoiler)
•6 months after the death of Seoyoon. At the Han river, stands Sunghoon.
As he gazes into the distance with his cold and tired eyes, he said "We could've atleast start all over again...but i was foolish to have left you alone even for a moment. I could've stayed and assured you that everything will be alright" "I'm sorry, I couldn't save you like my brother did" "But I don't regret loving you...so...i will continue living for your sake along with all our precious memories together" as the sun slowly fades away, he let out a painful yet genuine smile "Goodbye, Seoyoon" And with that, he left.
The end.
(ノ◕ヮ◕)ノ*.✧✨