Watch Konomi ja Nai kedo: Mukatsuku Ane to Aishou Batsugun Ecchi Episode 1

Episode 1: Ritsuki and Kyouya are siblings who seem to do little more than argue whenever they meet. Their constant bickering has become so normal that they even continue fighting in front of their friends, with neither willing to admit any affection or attraction toward the other. Their relationship begins to change when Ritsuki rushes home through the rain and accidentally runs into Kyouya at the entrance. She initially becomes angry at the interruption, but her reaction changes when she notices that Kyouya is shirtless and wet from the rain. His physique unexpectedly matches the type of body she finds attractive, leaving her momentarily unable to hide her interest. Ritsuki realizes that Kyouya has noticed her staring and attempts to leave before the situation becomes more awkward. In her haste, however, she has an accident and injures her ankle. Kyouya brings a compress and bandage into Ritsuki's room to help her, marking the first time in several years that he has entered his older sister's private space. The situation makes Kyouya increasingly conscious of Ritsuki as a woman rather than simply his sister, and he attempts to leave before his thoughts become more complicated. Ritsuki instead asks him to massage her injured ankle. Because Kyouya feels guilty about causing her injury, he reluctantly agrees to help. As the massage continues, the tension between them becomes increasingly difficult to ignore, and Kyouya realizes that Ritsuki's body is exactly the type he finds attractive. The story develops around this sudden realization, contrasting the siblings' long history of arguments with the unexpected attraction that begins to emerge between them. Their relationship shifts from hostility and rivalry toward romantic and physical tension, creating the central conflict of the two-episode OVA.