1) Mitsugi (密戯, Secret); Comic Mujin 2008-08
2) Futari no Mitsugi (二人の密戯, Their Secret Conference)

3) Bro☆Com (ブラ☆コン, Brother Complex); 2008-10
When Akari asks her best friend Miu if she's ever had sex, she's surprised to find that she had... With her own BROTHER! Now cute Akari starts to get ...