A Knowing Sister

Synopsis

So that girl finally grew up? My neighbor Ji-Eun suddenly came to share my room and motivate me sexually. I am Hae-Yeong, a student who is motivated because I will finally be able to have sex with my girlfriend Sena, after a long relationship, but… (also known as 아는 누나 / Aneun Nuna) Currently completed with 40 chapters available (starting from Chapter 1 up to the latest Chapter 40).