泣キ虫カレシ (Nakimushi Kareshi)

Crybaby Boyfriend is a song sung by Miku Hatsune and Len Kagamine. It is the one-hundred-and-sixty-sixth track in Other Vocaloid Songs 23: Greatest Hits Of Miku Volume 7 and the one-hundred-and-sixty-fourth track in Other Vocaloid Songs 26: Mostly Len Volume 2.