Original Orihinal na VOCALOID】 ECHO 【Gumi English】
Sa episode 41 ng assassination classroom (season 2 episode 19) sa 4:05 ng episode doon nagpatugtog ang isang musika, kung may nakakaalam ng pangalan ng kanta?
Assassination Classroom 2nd Season Ost - 02. 解 き 明 か さ れ る 謎 [Tokiakasa Reru Nazo] https://www.youtube.com/watch?v=XHYF3Dsg2ck
