Oneechan wa Koi Youkai  

お姉ちゃんは恋妖怪

Yuuki Kuwahara opted to utilize entering high school as an opportunity to reside independently at his father's family home. Although he went alone, he harbored a faint hope of encountering the girl he met there during his childhood. However, an unforeseen welcome was present in the house that was believed to be vacant!