Read manga: Onee-Chan Ga Kita

manga
Artists: Anzai Rikou
Status: ongoing
Latest chapter: Chapter 41
Updated at: May 24, 2023
Summary:

From ANN:The story revolves around Tomoya Mizuhara, a 13-year-old boy who suddenly gains a big sister when his father remarries. 17-year-old Ichika is a little strange, and her affection for Tomoya is rather overwhelming, if not scary. On top of things, Ichika's friend Ruri is the ultimate sadist. Then there is Ichika's big-breasted quarter-Japanese friend Marina.