Now that you've become such a good confidant, all the girls in Ore no Imouto are going to share secrets with you. Find out why Kuroneko avoids you, what's between Ayase and Kirino, why did Manami become so bold, see what's in Saori's pile otaku items and why did Kanako pop up. To make your life more chaotic, Kirino is in a fouler temper than usual.
As Kousaka Kyosuke, you have to balance your exam schedule, manage the school trip and remember to get presents for everyone. However, when you got back, everyone's acting weird. Make use of the new OIU system to read the body language. This is a new 2D live system that displays the character's minute movements. Characters' gazes soften and their expressions change in a more natural and fluid way.
When the girls get angry, things get messy, cut into their speeches through the Tsukkomi system to explain yourself. If you get things right, their affection for you rises. But don't overdo it, sometimes girls don't like being cut off.
Your sister isn't always cute. Her being cute is the reward itself.