“Don’t see me as a brother. See me as a full-fledged man.” I know it’s wrong… for me to get carried away by the intense passion of this man I thought was my step-brother… But I keep cumming…! Tamaki Kojima is an office lady who just broke up with her boyfriend. The one who happens to appear before her in that state is none other than Jun, her step brother who she hasn’t seen in years. Smiling refreshingly after being reunited after all these years, Jun asks Tamaki if he can stay at her house for a while. However, after finding some things around Tamaki’s house, his mood completely changes…!! “I’m the only one who loves you more than anyone else, you know?” His bottomless love he’s kept secret for over 10 years and his desire to have her all to himself know no bounds…!! The love story between a single-minded step brother and his step-sister who wants to find love begins now.