Unrequited love (recommendation request)

(older straight top x younger bottom gay)

I want manhwas where like the bottom has unrequited love for top and like many years later top getting rejected and realises that bottom meant so much, the storyline is not much important but I need it to be an emotional turmoil and should make heart ache it doesn't need to be younger or older or same age but I need a regret and chasing arc of a top who turns gay for bottom

(Hope this helps to someone who likes to read this genre too)