赤心性：カマトト荒療治 (Sekishinsei: Kamatoto Araryouji)



Sincerity: Drastic Treatment For Pretended Innocence is a song sung by Len Kagamine and Rin Kagamine. It is the one-hundred-and-eighty-fifth track in Other Vocaloid Songs and the two-hundred-and-thirty-sixth track in Other Vocaloid Songs 26: Mostly Len Volume 2.