How many songs are in the album "HAPPY RETENTION" by 梅田サイファー?

There are a total of 15 songs in "HAPPY RETENTION".

When was the album "HAPPY RETENTION" by 梅田サイファー released?

"HAPPY RETENTION" was released on September 24, 2025.

#	Track	Artist	Key	Camelot	BPM
1	HAPPY RETENTION	梅田サイファー, TAKE-M, HATCH, peko, KOPERU, KennyDoes, Cosaqu	D Major	10B	126
2	のちで	梅田サイファー, TAKE-M, peko, KennyDoes, KZ, R-Shitei, Cosaqu	D Major	10B	126
3	GOLDEN	梅田サイファー, Cosaqu, KennyDoes, TAKE-M, KOPERU, KBD, peko, KZ	D Major	10B	126
4	Keep Ya 頭 Up	梅田サイファー, KennyDoes, TAKE-M, KOPERU, KBD, HATCH, YugaSoda, peko, teppei, Cosaqu, ILL SWAG GAGA, KZ	D Major	10B	126
5	ミリオン☆ヒット	梅田サイファー, TAKE-M, peko, KennyDoes, ILL SWAG GAGA	F♯ Major	2B	140
6	OOKAMI	梅田サイファー, TAKE-M, KennyDoes, KBD, Cosaqu, peko, YugaSoda, KOPERU, teppei	D Major	10B	126
7	咆哮	梅田サイファー, TAKE-M, KOPERU, KennyDoes, teppei	B♭ Minor	3A	170
8	ウルサイレン	梅田サイファー, peko, KOPERU, TAKE-M, KennyDoes, ILL SWAG GAGA	D Major	10B	126
9	短すぎ	梅田サイファー, KennyDoes, TAKE-M, peko, YugaSoda	F♯ Major	2B	140
10	余韻	梅田サイファー, YugaSoda, KOPERU, KZ, Cosaqu, KBD, HATCH	D Major	10B	126
11	1%	梅田サイファー, TAKE-M, teppei, KZ, KOPERU, KBD, KennyDoes	D Major	10B	126
12	スローモーション	梅田サイファー, YugaSoda, KOPERU, peko, TAKE-M, KZ	D♭ Major	3B	92
13	Interlude(笑)	梅田サイファー	D Major	10B	126
14	みんなのおかげ	梅田サイファー, TAKE-M, KennyDoes, peko, HATCH, KBD	D Major	10B	126
15	GRADUATION	梅田サイファー, TAKE-M	G Major	9B	90