Creator/The Horizon - Zetsubo wo shire.....

I mean its manhwa but this is something a simple innocent person should avoid.

This will give you the taste of hell in only 21 chapters. Although there is a bit of happiness the feel train will hit you so hard that you might forget about the happiness that it offers.

For me it was devastating but this is reality. Just imagining it as a real life story the creator experienced or someone's real life experience will change the aspect you read it as.

Anyway I will be depressed for a week after this but overall its one of the best manhwa out there.