Hello, Happy World! - うちゃパ！で ぱっぴかポーんっ！Uchapa! de Pappi ka Pōn!

Len and Rin - A Gem, A Riddle, A Princess

ハロー、ハッピーワールド！(Hello, Happy World!, 헬로, 해피 월드!) - ドレミファロンド(Do Re Mi Fa Rondo, 도레미파 론도)

Origin. 40mP

cover, game ver.

It was originally performed by  Uchida Maaya.

不適切淑女 / Inappropriate Lady / Improper Lady by OSTER project

cover, full version.

It was originally performed by Iwasaki Yoshimi.

Itoshisa To Setsunasa To Kokoro Tsuyosa To covered by RAISE A SUILEN from BanG Dream (FULL VERSION)

reached the upload limit, new acc; https://soundcloud.com/user-533866428