I love this manga adaptation. I have read the manga, although the "character writing" of the main character (Shi Guang/Hikaru) is different from the manga. But I like it. Hikaru's initially calm character turns into a cheerful and goofy one. But the goofiness makes the story more lively.

Actually, the real manga is short. So there will be a lot of filler episodes, but most of the filler episodes don't feel like filler. Some episodes support story progress and character development. Except for a few episodes at the end. it felt a bit dragging.

But overall it is very good adaptation.
For overall experience i give it 9.5/10.
GOOD JOB.