Succubus ★ Connect!  

サキュバス★コネクト!

Yuina cherishes her artificial sibling despite not being biologically related. During one contemplative evening, she is transported into an unfamiliar realm. There, she encounters a man who mistreats her. Suddenly, a succubus emerges before her and rescues her from harm. Succu, the succubus, discloses that in order for them to return home, Succu must transform into one herself by seducing numerous men. Thus, their journey commences.