I heard A LOT of sad vocaloid songs but my শীর্ষ ones are Saihate , y to y , Heaven , servant of evil , young girls self harm habit, Ai wo , সঙ্গীত box, regret message, meltdown (listen to the lyrics its a suicide song) , rolling girl. theres prob mare but that's all I can think of right now
Falling Falling Snow দ্বারা my fave vocaloid and guy of all, Len Kagamine. It makes me cry every time for three reasons: 1. I always cry when Len does, and also theres nothing i can do to help him 2. I can relate to what hes feeling, im heartbroken almost every দিন deep down inside 3. theres just always something about songs with slow পিয়ানো accompaniments that always soothe me and yet make my হৃদয় sink all at the same time.
its a beautiful song, and also my পছন্দ song, and its a great song to cry to, fall asleep to, অথবা just put on replay when youre walking alone and need some self reflection.
I think "why don't আপনি call me yet?" is pretty sad. even if it was not supposed to be (I assume) sad, Rin's desperation to be called back দ্বারা Len is adorable. And something that most people can relate to.