okay this is my 1st time to review an anime :D so ill make it short *maybe*
Story 8/10
The styory is mainly about Time Machine Power to save friend. its like Steins;gate. i think the anime with that plot will be popular. Unfortunately, Because im is a Romance-lover i pretty dissapointed boku dake inai michi isn't dive in romance :<. but im satisfied with the story. Anime story and Manga story its rather different in the ending.
Art 7/10
Actually, im enjoy the Art. but i feels weird for satory's mother and kayo's mother lip.
Sound 8/10
Good. i like Ending song "Sore wa Chiisana Hikari no Youna" (y)
Character 9/10
the Development on every character are Well. And in the end of anime, boku dake ga inai michi display an adult version such as Kayo, kenya, hiromi, and etc. *i think its light spoiler, hehe*
Overall 9/10
Would i recomend this anime ?
yes
:D