High School DxD: Asia & Koneko no Himitsu no Keiyaku!?  

High School DxD: Asia & Koneko's Secret Contract?!, Highschool DxD: Ashia & Koneko Himitsu no Keiyaku!?, ハイスクールD×D アーシア＆小猫の ヒミツのけいやく!?, High School DxD:Asia and Koneko's Secret Contract!?, High-School DxD: Ashia & Koneko Himitsu no Keiyaku!?, High School DxD: I Contratti Segreti Di Asia & Koneko!

In this spin-off of high school dxd, the clumsy sister asia and reserved cutie koneko form an unlikely duo. they are tasked with answering summons from humans for various requests. however, these two little devil beauties may struggle to fulfill every desire that comes their way.

High School DxD: Asia & Koneko no Himitsu no Keiyaku!? was both digitally & physically published in English as High School DxD: Asia & Konekos Secret Contract!? by Yen Press on December 16, 2014.