Starting off this is one of those anime that you kind of have to sit through till the end to really enjoy and like...but trust me and anyone who has when they say it was worth every second of it. Its a brilliant anime in my opinion(<--keyword), at the beginning like i said its a bit hard to keep watching, and kind of leaves more to be desired, but as it goes one you can help but to understand that was kind of the point... maybe not intentional but its how it had to be for as the story continues the complexity expands and makes more and more sense....oddly at the same time a lack of sense, kind of have to keep track of it all. characters and there development are spot on, the animation style as clean/realistic/and complimented the story and characters perfectly. As for sound...i dont have that much experience in that but i can say the title and ending were perfect in there respects to the rest of the anime, without giving away details but as art itself was very nice, voice actors were great and none seemed awkward at all(they matched the characters)....besides that no adnormals sounds...
key point-If you confusing romance (not the simple straight forward/nor the kind that tosses you for a loop) and at the same kind entertains you and keeps your mind thinking of all the unimaginable possibilities that life and/or death allows...then this is one i would highly recommend-
overall score: 10/10