Long story short I found a video on youtube nearly six years ago and it was promptly taken down. I have been searching for it ever since, and am asking for aid and for people who like a challenging puzzle. I have only a few details;
1. These are the Japanese characters I copy and pasted from the original YouTube video before it was taken down; 感動 泣ける 私的神曲 アニソン ゲーソン メドレー . These in google translate turn out to say "Impressed cry private God song Anison Geson medley"
2. It is a female Japanese song artist who is playing an acoustic guitar, and that is the only instrument in the song from what I remember.
3. I believe it to be from an anime not only because Anison is a anime song festival of sorts, but the original YouTube video had a anime high school girl in a tan school uniform with orange-ish hair playing a guitar as the background.
4. I have tried contacting the original person who posted the video to no avail; under the YouTube user name of level6glassesbreaker. I also posted a video of me humming the tune on youtube; this is how desperate I actually am... anyone who is willing to help I thank you a thousand times in advance