MUG-MO , 豊川姫乃 (CV: 田中美海 ), 久々梨三華 (CV: 芹澤 優 ), 成瀬直子 (CV: 若井友希 ), 青木十子 (CV: 本泉莉奈 )

Comprised of:

1. MUG-MO Group, Began: 2021 in Japan
2. 豊川姫乃 Female Character, Began: in
3. 田中美海 Female Person, Born: 22 Jan 1996 in Kanagawa
4. 久々梨三華 Female Character, Began: in
5. 芹澤 優 Female Person, Born: 03 Dec 1994 in Tokyo
6. 成瀬直子 Female Character, Began: in
7. 若井友希 Female Person, Born: 30 Oct 1995 in Gifu
8. 青木十子 Female Character, Began: in
9. 本泉莉奈 Female Person, Born: 04 Feb 1993 in Fukushima

Recordings (6)

1. 扉を開けたら 3:57 (21 Apr 2021)
2. Let's try it!! 3:50 (21 Apr 2021)
3. 扉を開けたら (Instrumental) 3:57 (21 Apr 2021)
4. Let's try it!! (Instrumental) 3:50 (21 Apr 2021)
5. 扉を開けたら 〜MUG-MO全員ver.〜 3:57 (21 Apr 2021)
6. 扉を開けたら (TV size ver.) 1:30 (21 Apr 2021)