My Brother Loves Me Too Much (2017) Kisskh

Setoka is a high-school student who, after experiencing multiple love rejections, finally finds some popularity with several guys now interested in her at the same time & actively vying for her attention. Her big brother, Haruka, isn’t happy with this new turn of events as his own feelings are involved, but, unfortunately, Setoka has no idea that they are not blood-related siblings. Can Haruka continue to hide his feelings for Setoka and be the big brother she thinks he is?