H01461 Konomi ja Nai kedo Ep 2 - Siblings Cross the Line

Mayama Ritsuki and Kyoya cross the line between brother and sister in the heat of the moment, then realize they like each other's bodies, but the situation remains the same, with them fighting every time they meet. On their first night together while their parents are away, the tension leads to a fall, and a moment of silence with Kyoya on top of her, their feelings overlapping, with nothing to stop them.