this anime is 4 years old...its highly famous too...if they haven't seen it yet then that means they either don't have any interest in watching it or have already seen multiple spoilers from the fandom...adding the tags.

MD5 mismatch of https://media.tumblr.com/bde40d51165e29288dcd12a735ab554e/tumblr_mzu7tag3eS1rd8tfco1_1280.jpg