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, and one day, guided by her mysterious voice, she is taken away to a place unknown to her. Yuina is attacked by a man without knowing why and is in a state of despair. But at that moment, her helping hand that appeared along 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..." I, I wanted to "connect" with my beloved brother! I was "connected" to a lewd succubus!! But this is it...