Tonight My Sister and I.. Vol.4 (Shoujo Manga Love Story)

I've never thought of you as my sister. Then, a brother's lips brushed against those of his sister...Haruichi, who is two years older than his sister Natsumi, is the kindest, the coolest, and the bestest older brother once could ever have. It's easy to be jealous of how well they get along, and yet... the balance between the two begins to crumble as Natsumi starts her first year of high school.Haruichi is jealous of his friends getting closer to his sister, and Natsumi is angry at her brother for having a lover that looks strangely similar to her...With their hearts and minds whirring, they will share a night that could take them beyond mere siblings...