Can someone explain to me what the epilogue means? Is that anti depressant pills? Or what?

I have just finished reading it and the pills left me like wtf and I think that smoking and the pills are like another way yui wants to connect with kei, like copying him for harada knows what but I dont know probably is the way harada wants the readers to be shocked

Whoaaa i can live with your theory alone. Thanks for bringing that up!!

More like the proof of Yui's mental breakdown. He seems unfazed by everything but the truth is he doesn't want to disappoint anyone. In a way Niichan is more honest with himself, as he recognizes his problems and is honest with Yui about what he feels

Totally agree bc If yui accepted that he is doing the "correct" thing he would have told his parents about kei but he doesnt even want to hear about it xd in fact I think yui is crazier than kei in every aspect of their life

@Tolly I love the opposite routes Yui and Kei are going. Fits perfectly as the series' last chapter.
@sofiduo YUI is definitely crazier than Kei ever was. Though, I never imagine Yui become exactly like Kei, I mean to become the next paedo.