Oishii Coffee no Irekata

Naoki Prize winner Yuka Murayama's romantic masterpiece is finally adapted into manga for its 25th anniversary!
When Izumi Shiori's father is transferred away for his job, Izumi wanted to stay to finish high school so he moves in with his cousins. The younger cousin Joe was just like how Izumi remembered him, but the older cousin Karen has become a beautiful young woman.