Yuina has feelings for her brother, who is not related to her by blood. She lacks confidence in herself and spends her time in agony. One day, a mysterious voice guides him to an unknown place. Yuina is attacked by a man without knowing why, and is in a desperate situation. But at that time, the helping hand that appeared with the light was a ghost succubus! The succubus possesses Yuina's body and unleashes a naughty attack with furious force. A mysterious succubus who squeezes out men without worrying about naive Yuina's panic. What will happen to Yuina in a world where succubi are rampant? "I want to go home... to my brother..." Bo, me, I wanted to “connect” with my beloved brother! I was “connected” to a lewd succubus! ! But this is it...♡