Yut long's obsession with ash in banana fish

[Blackangel]

why is yut long so jealous when ash treasures eiji? i don't fuking get it but he should leave ash alone.
i don't want him to torture ash and ash had already gone through so much

 

[Rinko]

Yes but Eiji wouldn't be able to handle Ash.
I am sure of that and he needs a gentle lover but I don't think Eiji is up for the task

 

[Heatman]

Well, that's what obsession is all about, it would simply make you not have peace with someone till either you kill it or have it all by yourself and it was what Eji was passing through.

 

[Razor1911]

why is yut long so jealous when ash treasures eiji? i don't fuking get it but he should leave ash alone.
i don't want him to torture ash and ash had already gone through so much