Tenshi-tachi no Gogo II -Bangai Hen-

"Tenshi-tachi no Gogo 2 Bangai-hen" is a side-story of "Tenshi-tachi no Gogo 2: Minako". The game's protagonist is the brother of Kozue Yanagisawa, one of the female characters that appeared in "Minako". Their parents want to send him abroad to study, but he can't bear to be separated from his sister. Do his feelings to his sister cross the line, becoming forbidden love?..