Highly recommended (TW: Adult-minor but it's rather a platonic relationship, suicide, bullying, violence)
Before the show started, I already read the manga to understand the story better. But to be honest, this is a perfect adaptation of the drama as they made suitable adjustments (Angel's age and A-kun's arc) while keeping the quintessense of the manga. I bawled my eyes out when watching the drama. I cried even more than when reading the manga. It's this year's number 1 tearjerker and I consider this one a sibling of Eternal Yesterday.

The show has perfect directing. They also cast the right actors for each role. The Angel's actor looks like a real angel with that baby face and innocent smile while the Kouki's actor is excellent. Their acting excellently conveyed the heartbreaking story and made me bawl my eyes even though I already know what's coming. The theme songs (OP & ED) are also on point. Please check the Eternal MV of ED song on Youtube. It's another peak and Shuhei is also cast in that MV too.