Suga Shikao feat. Mummy-D(ost tegami bachi/letter bee) - Hajimari no Hi
Shikao Suga (Letter Bee) - Yakusoku
(Letter Bee OST) - Shikao Suga - Yakusoku (Почтовая пчела OST)
Suga Shikao feat. Mummy-D - Hajimari no Hi (OP Letter Bee)
Suga Shikao - Hajimari no Hi(op 1) Letter Bee