Memorial address is always the one that pops into my head when someone asks me what's my favouite ayu song.
Even though I wouldn't say I have a "favourite" song by her, Memorial address is a song that I have such an emotional connection to. I barely listen to it because it just effects me so much.
I could compose a list of all my favourite songs by ayu but it'd be impossible for me to decide
I love just about every song by her <3