Maji de Ore no Imouto ga Koi o Shita Rashii zo | Seriously, My Little Sister Has Fallen

Kyousuke is troubled by his childhood friend Manami's reaction to his advice about a confession. His little sister Kirino offers to listen to his problems, but their conversation quickly escalates into a physical encounter. Kirino, claiming to be a 'sister complex', initiates intimacy, leading to them having sex in his room. Kyousuke and Kirino finish having sex. Afterwards, Kirino tells Kyousuke to finish the adult game she brought earlier because there's a scene she wants to try out tomorrow. Kyousuke asks if she'll tell him she loves him tomorrow, to which she replies 'Absolutely not! '.