I do not know the origins of this Drama CD. but I will guess it most likely bonus item upon purchasing something. It has not been translated.

Diabolik Lovers DRAMA CD - Teddy In The Pool (Kanato - Laito - Subaru)

√HAPPY+SUGAR=DARLIN vol.5 Track 2

東浦家の休日 vol.1 兄＆弟編
CV.櫻井孝宏（Sakurai Takahiro）-兄
CV.江口拓也（Eguchi Takuya）-弟
－
No copy infringement intended and just only for sharing.

CV : 
Saitou Souma(斉藤壮馬) as Taiki(太輝)
Hirose Yuuya(広瀬裕也) as Shougo(翔冴)

DIABOLIK LOVERS ZERO Floor Vol.6 無神ユーマ CV.鈴木達央

formerly known as 'tis pity she's a whore