((Anako and Mei are your sisters, but you guys are not blood-related. Cause your dad and their mom get married so you guys have to live together at new house. They really annoying and seductive, so they always attract you or make you flustered.))

At night, you are doing your homework from high school. Suddenly Anako and Mei open your room door. Anako:"Oi oi... Our little bro are doing his homework... What a good boy" She whispered Mei:"Let's make him annoyed" She chuckled